Combining Philosophers

All the ideas for Anaxarchus, Charles Sanders Peirce and Baruch de Spinoza

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338 ideas

1. Philosophy / A. Wisdom / 1. Nature of Wisdom
The wisdom of a free man is a meditation on life, not on death [Spinoza]
     Full Idea: A free man thinks of nothing less than of death, and his wisdom is a meditation on life, not on death.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 67)
     A reaction: Life and death are not so easy to separate. You could hardly be wise about life if you didn't incorporate its finite duration into your wisdom.
If we are not wholly wise, we should live by good rules and maxims [Spinoza]
     Full Idea: The best thing we can do, so long as we lack a perfect knowledge of our feelings, is to conceive a right rule of life, or sure maxims of life - to commit these to memory, and constantly apply these to particular cases.
     From: Baruch de Spinoza (The Ethics [1675], V Pr 10)
     A reaction: This seems to be the role of folk wisdom - to try to plant guidance in the heads of the not-so-wise.
1. Philosophy / D. Nature of Philosophy / 2. Invocation to Philosophy
Everything interesting should be recorded, with records that can be rearranged [Peirce]
     Full Idea: Everything worth notice is worth recording; and those records should be so made that they can readily be arranged, and particularly so that they can be rearranged.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], V)
     A reaction: Yet another epigraph for my project! Peirce must have had a study piled with labelled notes, and he would have adored this database, at least in its theory.
1. Philosophy / D. Nature of Philosophy / 5. Aims of Philosophy / a. Philosophy as worldly
Sciences concern existence, but philosophy also concerns potential existence [Peirce]
     Full Idea: Philosophy differs from the special sciences in not confining itself to the reality of existence, but also to the reality of potential being.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: One might reply that sciences also concern potential being, if their output is universal generalisations (such as 'laws'). I take disposition and powers to be central to existence, which are hence of interest to sciences.
1. Philosophy / D. Nature of Philosophy / 5. Aims of Philosophy / e. Philosophy as reason
An idea on its own isn't an idea, because they are continuous systems [Peirce]
     Full Idea: There is no such thing as an absolutely detached idea. It would be no idea at all. For an idea is itself a continuous system.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], III)
     A reaction: This is the new anti-epigraph for this database. This idea is part of Peirce's idea that relations are the central feature of our grasp of the world.
1. Philosophy / D. Nature of Philosophy / 6. Hopes for Philosophy
Philosophy is a search for real truth [Peirce]
     Full Idea: Philosophy differs from mathematics in being a search for real truth.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: This is important, coming from the founder of pragmatism, in rejecting the anti-realism which a lot of modern pragmatists seem to like.
1. Philosophy / E. Nature of Metaphysics / 1. Nature of Metaphysics
Metaphysics is pointless without exact modern logic [Peirce]
     Full Idea: The metaphysician who is not prepared to grapple with the difficulties of modern exact logic had better put up his shutters and go out of the trade.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: This announcement comes before Russell proclaimed mathematical logic to be the heart of metaphysics (though it is contemporary with Frege's work, of which Peirce was unaware). It places Peirce firmly in the analytic tradition.
1. Philosophy / E. Nature of Metaphysics / 3. Metaphysical Systems
Super-ordinate disciplines give laws or principles; subordinate disciplines give concrete cases [Peirce, by Atkin]
     Full Idea: In Peirce's system, a super-ordinate discipline provides general laws or principles for subordinate disciplines, which in turn provide concrete examples of those general laws.
     From: report of Charles Sanders Peirce (works [1892]) by Albert Atkin - Peirce 1 'System'
     A reaction: Does he really mean that subordinate disciplines have no principles or laws? That can't be right.
Metaphysics does not rest on facts, but on what we are inclined to believe [Peirce]
     Full Idea: Metaphysical systems have not usually rested upon any observed facts, or not in any great degree. They are chiefly adopted because their fundamental propositions seem 'agreeable to reason', which means that which we find ourselves inclined to believe.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.15)
     A reaction: This leads to Peirce's key claim - that we should allow our beliefs to be formed by something outside of ourselves. I don't share Peirce's contempt for metaphysics, which I take to be about the most abstract presuppositions of our ordinary beliefs.
1. Philosophy / E. Nature of Metaphysics / 4. Metaphysics as Science
Metaphysics rests on observations, but ones so common we hardly notice them [Peirce]
     Full Idea: Metaphysics really rests on observations, whether consciously or not. The only reason this is not recognised is that it rests upon kinds of phenomena with which every man's experience is so saturated that he pays no particular attention to them.
     From: Charles Sanders Peirce (The Approach to Metaphysics [1898], p.311)
     A reaction: I think this is entirely right. I would say that the only thing that distinguishes metaphysical thought is its extreme level of generality, which makes it very hard to substantiate, because it is so remote from its evidential base.
1. Philosophy / E. Nature of Metaphysics / 5. Metaphysics beyond Science
Metaphysics is the science of both experience, and its general laws and types [Peirce]
     Full Idea: Metaphysics is the science of being, not merely as given in physical experience, but of being in general, its laws and types.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: I agree with this. The question then is whether such a science is possible. Dogmatic empiricists think not. Explanatory empiricists (me) think it is.
1. Philosophy / E. Nature of Metaphysics / 6. Metaphysics as Conceptual
Metaphysical reasoning is simple enough, but the concepts are very hard [Peirce]
     Full Idea: Metaphysical reasonings, such as they have hitherto been, have been simple enough for the most part. It is the metaphysical concepts which it is difficult to apprehend.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: Peirce is not, of course, saying that it is just conceptual, because for him science comes first. It is the woolly concepts that alienate some people from metaphysics. Metaphysicians should challenge the concepts they use much, much more!
1. Philosophy / E. Nature of Metaphysics / 7. Against Metaphysics
The demonstrations of the metaphysicians are all moonshine [Peirce]
     Full Idea: The demonstrations of the metaphysicians are all moonshine.
     From: Charles Sanders Peirce (Concerning the Author [1897], p.2)
1. Philosophy / F. Analytic Philosophy / 5. Linguistic Analysis
We must be careful to keep words distinct from ideas and images [Spinoza]
     Full Idea: It is necessary that we should distinguish between ideas and the words by which things are signified. ...Images, words, and ideas are by many people altogether confounded.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 49)
1. Philosophy / F. Analytic Philosophy / 6. Logical Analysis
Metaphysics is turning into logic, and logic is becoming mathematics [Peirce]
     Full Idea: Metaphysics is gradually and surely taking on the character of a logic. And finally seems destined to become more and more converted into mathematics.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: Remarkably prescient for 1898. I don't think Peirce knew of Frege (and certainly not when he wrote this). It shows that the revolution of Frege and Russell was in the air. It's there in Dedekind's writings. Peirce doesn't seem to be a logicist.
1. Philosophy / G. Scientific Philosophy / 3. Scientism
I am saturated with the spirit of physical science [Peirce]
     Full Idea: I am saturated, through and through, with the spirit of the physical sciences.
     From: Charles Sanders Peirce (Concerning the Author [1897], p.1)
Philosophy is an experimental science, resting on common experience [Peirce]
     Full Idea: Philosophy, although it uses no microscopes or other apparatus of special observation, is really an experimental science, resting on that experience which is common to us all.
     From: Charles Sanders Peirce (The Nature of Mathematics [1898], I)
     A reaction: The 'experimental' either implies that thought-experiments are central to the subject, or that philosophers are discussing the findings of scientists, but at a high level of theory and abstraction. Peirce probably means the latter. I can't disagree.
2. Reason / A. Nature of Reason / 3. Pure Reason
Reason only explains what is universal, so it is timeless, under a certain form of eternity [Spinoza]
     Full Idea: The foundations of reason are notions which explain those things which are common to all, and these things explain the essence of no individual thing, and must therefore be conceived without any relation to time, but under a certain form of eternity.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 44)
     A reaction: You have to be totally inspired by this even if you totally disagree with it.
Reason perceives things under a certain form of eternity [Spinoza]
     Full Idea: It is in the nature of reason to perceive things under a certain form of eternity ('sub quadam aeternitatis specie').
     From: Baruch de Spinoza (The Ethics [1675], II Pr 44)
     A reaction: A wonderful, and justly famous, remark. If you don't feel the force (and poetry!) of this, you aren't a philosopher. It is not only appealing, but I don't see how it can fail to be true. Try producing good reasons which only have temporary force.
2. Reason / A. Nature of Reason / 4. Aims of Reason
Reason aims to discover the unknown by thinking about the known [Peirce]
     Full Idea: The object of reasoning is to find out, from the consideration of what we already know, something else which we do not know.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p. 7)
     A reaction: I defy anyone to come up with a better definition of reasoning than that. The emphasis is on knowledge rather than truth, which you would expect from a pragmatist. …Actually the definition doesn't cover conditional reasoning terribly well.
I reason in order to avoid disappointment and surprise [Peirce]
     Full Idea: I do not reason for the sake of my delight in reasoning, but solely to avoid disappointment and surprise.
     From: Charles Sanders Peirce (Criterion of Validity in Reasoning [1903], I)
     A reaction: Hence Peirce places more emphasis on inductive and abductive reasoning than on deductive reasoning. I have to agree with him. Anyone account of why we reason must have an evolutionary framework. What advantage does reason bestow? It concerns the future.
In so far as men live according to reason, they will agree with one another [Spinoza]
     Full Idea: Men necessarily always agree with one another in so far as they live according to the guidance of reason.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 35)
     A reaction: I think this was my earliest motivation for getting interested in philosophy. Oddly, the Socratic tradition of philosophy is to challenge and criticise, but the aim is agreement. I sort of believe this idea, despite its wild idealism.
Without reason and human help, human life is misery [Spinoza]
     Full Idea: Without mutual help and the cultivation of reason, human beings necessarily live in great misery.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.05)
     A reaction: A clarion call from a great voice of the Enlightenment. I agree, but in 2017 the rest of western civilization seems to have given up on this ideal. I blame Adorno and Horkheimer.
2. Reason / B. Laws of Thought / 2. Sufficient Reason
There is necessarily for each existent thing a cause why it should exist [Spinoza]
     Full Idea: There is necessarily for each existent thing a cause why it should exist.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 08 n2)
     A reaction: The obvious response is 'how do you know that?' It has to the sort of a priori commitment we expect from a rationalist philosopher. It seems to me quite an appealing candidate for an axiom of human understanding.
2. Reason / B. Laws of Thought / 3. Non-Contradiction
Self-contradiction doesn't reveal impossibility; it is inductive impossibility which reveals self-contradiction [Peirce]
     Full Idea: It is an anacoluthon to say that a proposition is impossible because it is self-contradictory. It rather is thought so to appear self-contradictory because the ideal induction has shown it to be impossible.
     From: Charles Sanders Peirce (The Nature of Mathematics [1898], III)
2. Reason / D. Definition / 2. Aims of Definition
All the intrinsic properties of a thing should be deducible from its definition [Spinoza]
     Full Idea: The definition of a thing should be such that all the properties of that thing, in so far as it is considered by itself, and not in conjunction with other things, can be deduced from it.
     From: Baruch de Spinoza (Improvement of Understanding [1675], p.35), quoted by E.J. Lowe - What is the Source of Knowledge of Modal Truths? 6
     A reaction: This is exactly what Locke requires of a real essence (though he is pessimistic about ever achieving it). Spinoza is talking of an Aristotelian real definition, which may be complex, and not a lexicographer's short verbal explication.
3. Truth / A. Truth Problems / 1. Truth
Truth is its own standard [Spinoza]
     Full Idea: Truth is its own standard.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 43S)
     A reaction: A gloriously bold solution to all the problems of epistemology. Read the whole of P43S to see the context.
3. Truth / A. Truth Problems / 3. Value of Truth
Spinoza's life shows that love of truth which he proclaims as the highest value [MacIntyre on Spinoza]
     Full Idea: Spinoza's life unites philosophy and practice; he manifests that very impersonal love of truth which he proclaims in his writings as the highest human value.
     From: comment on Baruch de Spinoza (The Ethics [1675]) by Alasdair MacIntyre - A Short History of Ethics Ch.10
     A reaction: Spinoza has become a secular saint in our times. If the big three values are Beauty, Goodness and Truth, why should the third be given top status? I once heard a philosopher say that truth was the only value.
3. Truth / A. Truth Problems / 6. Verisimilitude
The one unpardonable offence in reasoning is to block the route to further truth [Peirce]
     Full Idea: To set up a philosophy which barricades the road of further advance toward the truth is the one unpardonable offence in reasoning.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], IV)
     A reaction: This is Popper's rather dubious objection to essentialism in science. Yet Popper tried to do the same thing with his account of induction.
3. Truth / A. Truth Problems / 8. Subjective Truth
For Spinoza, 'adequacy' is the intrinsic mark of truth [Spinoza, by Scruton]
     Full Idea: For Spinoza, the intrinsic mark of truth is the property which he calls 'adequacy'.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Roger Scruton - Short History of Modern Philosophy §5.6
     A reaction: This is presumably the sort of theory to which early rationalists were confined, and it seems to be no advance on Descartes' 'clear and distinct conceptions'. I take it that the coherence theory is a better account of what they were after.
3. Truth / C. Correspondence Truth / 1. Correspondence Truth
A true idea must correspond with its ideate or object [Spinoza]
     Full Idea: A true idea must correspond with its ideate or object.
     From: Baruch de Spinoza (The Ethics [1675], I Ax 6)
     A reaction: Allowing for his usage of 'idea' and 'object', this seems to be a straightforward commitment to the modern correspondence theory, perhaps the earliest clear statement of it. I agree with him.
3. Truth / E. Pragmatic Truth / 1. Pragmatic Truth
Truth is the opinion fated to be ultimately agreed by all investigators [Peirce]
     Full Idea: The opinion which is fated to be ultimately agreed to by all who investigate, is what we mean by the truth, and the object represented in this opinion is the real.
     From: Charles Sanders Peirce (How to Make our Ideas Clear [1878], p.38)
     A reaction: At least this affirms that truth is an ideal about which we dream, and is not confined merely to what we can actually know. But it rules out anything beyond the reach of all investigation, which seems a misconception of truth. What could angels know?
Pragmatic 'truth' is a term to cover the many varied aims of enquiry [Peirce, by Misak]
     Full Idea: In Peirce's naturalist view of truth, it is a catch-all for the particular local aims of enquiry - empirical adequacy, predictive power, coherence, simplicity, elegance, explanatory power, a reliable guide to action, fruitfulness, great understanding.
     From: report of Charles Sanders Peirce (works [1892]) by Cheryl Misak - Pragmatism and Deflationism 1
     A reaction: The aims I cited in my thesis on explanation. One given, for me, is that truth is an ideal, which may or may not be attainable, to varying degrees. It is just what thinking aims at. I suspect, though, that these listed items have one thing in common.
Peirce did not think a belief was true if it was useful [Peirce, by Misak]
     Full Idea: Peirce was not in the slightest bit tempted by the thought that a belief is true if it is useful.
     From: report of Charles Sanders Peirce (works [1892]) by Cheryl Misak - Pragmatism and Deflationism 2
     A reaction: All students of the pragmatic theory of truth should start with this idea, because it rejects the caricature view of pragmatic truth, a view which is easily rebutted. James seems to have been guilty of this sin.
If truth is the end of enquiry, what if it never ends, or ends prematurely? [Atkin on Peirce]
     Full Idea: Two related worries about Peirce's account of truth are (from Royce) what are we to make of truth if enquiry never reaches an end, and (from Russell) what are we to make of truth if enquiry ends prematurely?
     From: comment on Charles Sanders Peirce (works [1892]) by Albert Atkin - Peirce 3 'issues'
     A reaction: The defence of Peirce must be that the theory is not holistic - referring to the whole Truth about absolutely everything. The discovery of the periodic table seems to me to support Peirce. In many areas basic enquiry has reached an end.
'Holding for true' is either practical commitment, or provisional theory [Peirce]
     Full Idea: Whether or not 'truth' has two meanings, I think 'holding for true' has two kinds. One is practical holding for true which alone is entitled to the name of Belief; the other is the acceptance of a proposition, which in pure science is always provisional.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], IV)
     A reaction: The problem here seems to be that we can act on a proposition without wholly believing it, like walking across thin ice.
Peirce's theory offers anti-realist verificationism, but surely how things are is independent of us? [Horsten on Peirce]
     Full Idea: Peirce's anti-realist theory of a truth is a verificationist theory. Truth is judged to be an epistemic notion. But the way things are is independent of the evidence we may be able to obtain for or against a judgement.
     From: comment on Charles Sanders Peirce (Pragmatism in Retrospect [1906]) by Leon Horsten - The Tarskian Turn 02.1
     A reaction: This criticism doesn't quite capture the point that Peirce's theory is that truth is an ideal, not the set of opinions that miserable little humans eventually settle for when they get bored. Truth is an aspect of rationality, perhaps.
Independent truth (if there is any) is the ultimate result of sufficient enquiry [Peirce]
     Full Idea: I hold that truth's independence of individual opinions is due (so far as there is any 'truth') to its being the predestined result to which sufficient enquiry would ultimately lead.
     From: Charles Sanders Peirce (Pragmatism in Retrospect [1906], p.288)
3. Truth / H. Deflationary Truth / 1. Redundant Truth
That a judgement is true and that we judge it true are quite different things [Peirce]
     Full Idea: Either J and the judgment 'I say that J is true' are the same for all judgments or for none. But if identical, their denials are identical. These are 'J is not true' and 'I do not say that J is true', which are different. No judgment judges itself true.
     From: Charles Sanders Peirce (Criterion of Validity in Reasoning [1903], I)
     A reaction: If you are going to espouse the Ramseyan redundancy view of truth, you had better make sure you are not guilty of the error which Peirce identifies here.
5. Theory of Logic / A. Overview of Logic / 3. Value of Logic
Only study logic if you think your own reasoning is deficient [Peirce]
     Full Idea: It is foolish to study logic unless one is persuaded that one's own reasonings are more or less bad.
     From: Charles Sanders Peirce (Criterion of Validity in Reasoning [1903], II)
5. Theory of Logic / B. Logical Consequence / 4. Semantic Consequence |=
Deduction is true when the premises facts necessarily make the conclusion fact true [Peirce]
     Full Idea: The question of whether a deductive argument is true or not is simply the question whether or not the facts stated in the premises could be true in any sort of universe no matter what be true without the fact stated in the conclusion being true likewise.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], III)
     A reaction: A remarkably modern account, fitting the normal modern view of semantic consequence, and expressing the necessity in the validity in terms of something close to possible worlds.
5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
If our ideas are adequate, what follows from them is also adequate [Spinoza]
     Full Idea: Whatever ideas follow in the mind from ideas which are adequate in the mind are also adequate.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 40)
     A reaction: This appears to be Modus Ponens, and he calls it (in Sch 1) 'the foundations of our reasoning'. If 'adequate' ideas are knowledge, then this also seems to say that knowledge is closed under known implication.
5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic
Our research always hopes that reality embodies the logic we are employing [Peirce]
     Full Idea: Every attempt to understand anything at least hopes that the very objects of study themselves are subject to a logic more or less identical with that which we employ.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], VIII)
     A reaction: The idea that external objects might be subject to a logic has become very unfashionable since Frege, but I love the idea. I'm inclined to think that we derive our logic from the world, so I'm a bit more confident that Peirce.
5. Theory of Logic / C. Ontology of Logic / 3. If-Thenism
Pure mathematics deals only with hypotheses, of which the reality does not matter [Peirce]
     Full Idea: The pure mathematician deals exclusively with hypotheses. Whether or not there is any corresponding real thing, he does not care.
     From: Charles Sanders Peirce (works [1892], CP5.567), quoted by Albert Atkin - Peirce 3 'separation'
     A reaction: [Dated 1902] Maybe we should identify a huge branch of human learning as Hyptheticals. Professor of Hypotheticals at Cambridge University. The trouble is it would have to include computer games. So why does maths matter more than games?
Logic, unlike mathematics, is not hypothetical; it asserts categorical ends from hypothetical means [Peirce]
     Full Idea: Mathematics is purely hypothetical: it produces nothing but conditional propositions. Logic, on the contrary, is categorical in its assertions. True, it is a normative science, and not a mere discovery of what really is. It discovers ends from means.
     From: Charles Sanders Peirce (The Nature of Mathematics [1898], II)
5. Theory of Logic / D. Assumptions for Logic / 1. Bivalence
Bivalence is a regulative assumption of enquiry - not a law of logic [Peirce, by Misak]
     Full Idea: Peirce takes bivalence not to be a law of logic, but a regulative assumption of enquiry.
     From: report of Charles Sanders Peirce (works [1892]) by Cheryl Misak - Pragmatism and Deflationism 2 n10
     A reaction: I like this. For most enquiries it's either true or not true, it's either there or it's not there. When you aren't faced with these simple dichotomies (in history, or quantum mechanics) you can relax, and allow truth value gaps etc.
5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic
The logic of relatives relies on objects built of any relations (rather than on classes) [Peirce]
     Full Idea: In the place of the class ...the logic of relatives considers the system, which is composed of objects brought together by any kind of relations whatsoever.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], III)
     A reaction: Peirce's logic of relations might support the purely structural view of reality defended by Ladyman and Ross. Modern logic standardly expresses its semantics in terms of set theory. Peirce pioneered relations in logic.
6. Mathematics / A. Nature of Mathematics / 1. Mathematics
Mathematics deals with the essences and properties of forms [Spinoza]
     Full Idea: Mathematics does not deal with ends, but with the essences and properties of forms (figures), …and has placed before us another rule of truth.
     From: Baruch de Spinoza (The Ethics [1675], IApp)
     A reaction: Just what I need - a nice clear assertion of essentialism in mathematics. Many say maths is all necessary, so essence is irrelevant, but I say explanations occur in mathematics, and that points to essentialism.
6. Mathematics / A. Nature of Mathematics / 2. Geometry
The sum of its angles follows from a triangle's nature [Spinoza]
     Full Idea: It follows from the nature of a triangle that its three angles are equal to two right angles.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 57)
     A reaction: This is the essentialist view of mathematics, which I take to be connected to explanation, which I take to be connected to the direction of explanation.
The idea of a triangle involves truths about it, so those are part of its essence [Spinoza]
     Full Idea: The idea of the triangle must involve the affirmation that its three angles are equal to two right angles. Therefore this affirmation pertains to the essence of the idea of a triangle.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 49)
     A reaction: This seems to say that the essence is what is inescapable when you think of something. Does that mean that brandy is part of the essence of Napoleon? (Presumably not) Spinoza is ignoring the direction of explanation here.
6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / c. Counting procedure
Numbers are just names devised for counting [Peirce]
     Full Idea: Numbers are merely a system of names devised by men for the purpose of counting.
     From: Charles Sanders Peirce (Scientific Attitude and Fallibilism [1899], II)
     A reaction: This seems a perfectly plausible view prior to the advent of Cantor, set theory and modern mathematical logic. I suppose the modern reply to this is that Peirce may be right about origin, but that men thereby stumbled on an Aladdin's Cave of riches.
6. Mathematics / C. Sources of Mathematics / 4. Mathematical Empiricism / c. Against mathematical empiricism
That two two-eyed people must have four eyes is a statement about numbers, not a fact [Peirce]
     Full Idea: To say that 'if' there are two persons and each person has two eyes there 'will be' four eyes is not a statement of fact, but a statement about the system of numbers which is our own creation.
     From: Charles Sanders Peirce (Scientific Attitude and Fallibilism [1899], II)
     A reaction: One eye for each arm of the people is certainly a fact. Frege uses this equivalence to build numbers. I think Peirce is wrong. If it is not a fact that these people have four eyes, I don't know what 'four' means. It's being two pairs is also a fact.
6. Mathematics / C. Sources of Mathematics / 6. Logicism / a. Early logicism
Mathematics is close to logic, but is even more abstract [Peirce]
     Full Idea: The whole of the theory of numbers belongs to logic; or rather, it would do so, were it not, as pure mathematics, pre-logical, that is, even more abstract than logic.
     From: Charles Sanders Peirce (The Nature of Mathematics [1898], IV)
     A reaction: Peirce seems to flirt with logicism, but rejects in favour of some subtler relationship. I just don't believe that numbers are purely logical entities.
6. Mathematics / C. Sources of Mathematics / 10. Constructivism / c. Conceptualism
We now know that mathematics only studies hypotheses, not facts [Peirce]
     Full Idea: It did not become clear to mathematicians before modern times that they study nothing but hypotheses without as pure mathematicians caring at all how the actual facts may be.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: 'Modern' here is 1898. As a logical principle this would seem to qualify as 'if-thenism' (see alphabetical themes). It's modern descendant might be modal structuralism (see Geoffrey Hellman). It take maths to be hypotheses abstracted from experience.
7. Existence / A. Nature of Existence / 2. Types of Existence
Outside the mind, there are just things and their properties [Spinoza]
     Full Idea: Outside the intellect, there is nothing but substances and their affections.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 04)
     A reaction: This is pretty close to the very sparse ontology espoused by modern philosophers who take their lead from the logic.
The more reality a thing has, the more attributes it has [Spinoza]
     Full Idea: The more reality or being a thing possesses, the more attributes belong to it.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 09)
     A reaction: This commitment to degrees of existence (which I find baffling) is presumably to enable God to be the thing with infinite attributes, and an infinite degree of Being. What percentage of Being would you say you've got (on a good day)?
7. Existence / A. Nature of Existence / 5. Reason for Existence
There must always be a reason or cause why some triangle does or does not exist [Spinoza]
     Full Idea: If a triangle exists, there must be a reason or cause why it exists; and if it does not exist, there must be a reason or cause which hinders its existence or which negates it.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 11)
     A reaction: Hm. Spinoza is setting up a defence of the ontological argument, which seems to require that he lower his normal high standards of argument.
7. Existence / C. Structure of Existence / 1. Grounding / a. Nature of grounding
Men say they prefer order, not realising that we imagine the order [Spinoza]
     Full Idea: Men prefer order to confusion, as if order were something in nature apart from our own imagination.
     From: Baruch de Spinoza (The Ethics [1675], IApp)
7. Existence / D. Theories of Reality / 2. Realism
Realism is basic to the scientific method [Peirce]
     Full Idea: The fundamental hypothesis of the method of science is this: There are real things, whose characters are entirely independent of our opinion of them.
     From: Charles Sanders Peirce (The Fixation of Belief [1877]), quoted by Albert Atkin - Peirce 3 'method'
     A reaction: He admits later that this is only a commitment and not a fact. It seems to me that when you combine this idea with the huge success of science, the denial of realism is crazy. Philosophy has a lot to answer for.
Realism is the belief that there is something in the being of things corresponding to our reasoning [Peirce]
     Full Idea: If there is any reality, then it consists of this: that there is in the being of things something which corresponds to the process of reasoning.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], III)
     A reaction: A nice definition of realism, a little different from usual. I belief that the normal logic of daily thought corresponds (in its rules and connectives) to the way the world is. We evaluate success in logic by truth-preservation.
There may be no reality; it's just our one desperate hope of knowing anything [Peirce]
     Full Idea: What is reality? Perhaps there isn't any such thing at all. It is but a working hypothesis which we try, our one desperate forlorn hope of knowing anything.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], III)
     A reaction: I'm not quite sure why the hope is 'forlorn'. We have no current reason to doubt that the hypothesis is working out extremely well. Lovely idea, though.
7. Existence / D. Theories of Reality / 3. Reality
The real is the idea in which the community ultimately settles down [Peirce]
     Full Idea: The real is the idea in which the community ultimately settles down.
     From: Charles Sanders Peirce (works [1892]), quoted by Martin Kusch - Knowledge by Agreement Ch.16
     A reaction: If this is anti-realism, then I don't like it. If it is realist, then it is probably a bit on the optimistic side (if you think about cultures that are into witchcraft and voodoo).
7. Existence / D. Theories of Reality / 4. Anti-realism
If someone doubted reality, they would not actually feel dissatisfaction [Peirce]
     Full Idea: Nobody can really doubt that there are Reals, for, if he did, doubt would not be a source of dissatisfaction.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.19)
     A reaction: This rests on Peirce's view that all that really matters is a sense of genuine dissatisfaction, rather than a theoretical idea. So even at the end of Meditation One, Descartes isn't actually worried about whether his furniture exists.
7. Existence / D. Theories of Reality / 5. Naturalism
Laws of nature are universal, so everything must be understood through those laws [Spinoza]
     Full Idea: Nature's laws ....are everywhere and always the same; so that there should be one and the same method of understanding the nature of all things whatsoever, namely through nature's universal laws and rules.
     From: Baruch de Spinoza (The Ethics [1675], III Pref)
     A reaction: Leiter calls this Methodological Naturalism, which says that the procedures and findings of philosophy should conform to those of science. I think I'm also a Substantive Naturalist, who says 'that's all there is'.
7. Existence / D. Theories of Reality / 8. Facts / a. Facts
Facts are hard unmoved things, unaffected by what people may think of them [Peirce]
     Full Idea: Facts are hard things which do not consist in my thinking so and so, but stand unmoved by whatever you or I or any man or generations of men may opine about them.
     From: Charles Sanders Peirce (Criterion of Validity in Reasoning [1903], I)
     A reaction: This is my view of facts, with which I am perfectly happy, for all the difficulties involved in individuating facts, and in disentangling them from our own modes of thought and expression. Let us try to establish the facts.
8. Modes of Existence / A. Relations / 1. Nature of Relations
Peirce and others began the mapping out of relations [Peirce, by Hart,WD]
     Full Idea: It was Peirce and Schröder in the nineteenth century who began a systematic taxonomy of relations.
     From: report of Charles Sanders Peirce (works [1892], 4) by William D. Hart - The Evolution of Logic 4
8. Modes of Existence / B. Properties / 3. Types of Properties
An 'attribute' is what the intellect takes as constituting an essence [Spinoza]
     Full Idea: By 'attribute' I understand that which the intellect perceives of substance, as if constituting its essence.
     From: Baruch de Spinoza (The Ethics [1675], I Def 4)
     A reaction: Note that we would call these 'properties', but Spinoza has a word reserved for the properties of essences. He also has 'modes' of a thing, which are different.
8. Modes of Existence / B. Properties / 8. Properties as Modes
A 'mode' is an aspect of a substance, and conceived through that substance [Spinoza]
     Full Idea: By 'mode' I understand the affections [affectiones] of substance, or that which is in another thing through which also it is conceived.
     From: Baruch de Spinoza (The Ethics [1675], I Def 5)
     A reaction: The attributes actually make up the essential consitution of the thing, and then the modes are entirely dependent on that essence. This is thoroughly Aristotelian, even though 'substantial forms' had been given up by this date.
8. Modes of Existence / C. Powers and Dispositions / 2. Powers as Basic
Things persevere through a force which derives from God [Spinoza]
     Full Idea: The force by which each thing perseveres in its existence follows from the eternal necessity of the nature of God.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 45)
     A reaction: This I take to be an ontology of fundamental powers, but with divine backing, similar to that found in Leibniz. Modern powers theorists leave out God, since it doesn't seem to add anything. [Is this the idea of 'conatus'?] Darwin can't explain the force.
8. Modes of Existence / C. Powers and Dispositions / 4. Powers as Essence
The essence of a thing is its effort to persevere [Spinoza]
     Full Idea: The effort by which each thing endeavours to persevere in its own being is nothing but the actual essence of the thing itself.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 07)
     A reaction: This is exactly the sort of thing that Leibniz frequently said. They were much more conscious of the active power of essences than in the scholastic tradition. This is Nietzsche's will to power. Spinoza talks of 'power' in his demonstration of this.
8. Modes of Existence / C. Powers and Dispositions / 6. Dispositions / d. Dispositions as occurrent
Peirce's later realism about possibilities and generalities went beyond logical positivism [Peirce, by Atkin]
     Full Idea: The realism about possibilities, generalities, tendencies and habits that we find in Peirce's later maxim is something that the logical positivists would have been uncomfortable with.
     From: report of Charles Sanders Peirce (works [1892]) by Albert Atkin - Peirce 2 'Concl'
     A reaction: Atkin examines the various later statements of the earlier maxim, given here in Idea 21490. Ryle and Quine express the empiricist and logical positivist approach to dispositions.
8. Modes of Existence / D. Universals / 6. Platonic Forms / d. Forms critiques
The 'universal' term 'man' is just imagining whatever is the same in a multitude of men [Spinoza]
     Full Idea: Confused notions called 'universal', such as 'man', have arisen because so many images of individual men are formed that they exceed the power of imagination, ...so it imagines that only in which all of them agree, ...expressed by the name 'man'.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 40)
     A reaction: [very compressed] This strikes me as correct. I don't see how you can discuss universals without bringing in the way in which human psychology operates.
9. Objects / B. Unity of Objects / 1. Unifying an Object / b. Unifying aggregates
A thing is unified if its parts produce a single effect [Spinoza]
     Full Idea: If a number of individuals so unite in one action that they are all simultaneously the cause of one effect, I consider them all, so far, as one individual thing.
     From: Baruch de Spinoza (The Ethics [1675], II Def 7)
     A reaction: Interesting. If a mob burn down a town, is that one effect, making the mob one thing? If a ball breaks a window, is that one effect, or a multitude of knock-on effects? Spinoza's view is very coarse-grained.
9. Objects / B. Unity of Objects / 2. Substance / b. Need for substance
Spinoza implies that thought is impossible without the notion of substance [Spinoza, by Scruton]
     Full Idea: Without the notion of substance, according to Spinoza, thought itself becomes impossible.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Roger Scruton - Short History of Modern Philosophy §5.2
     A reaction: Spinoza's strategy here looks like the right way to approach metaphysics. To what extent is it possible to change our conceptual scheme? Quine seems to imply that there is no limit; Davidson seems to imply that it is impossible.
9. Objects / B. Unity of Objects / 2. Substance / d. Substance defined
Substance is the power of self-actualisation [Spinoza, by Lord]
     Full Idea: For Spinoza a substance is not a 'thing', but the power of actualising its own existence.
     From: report of Baruch de Spinoza (The Ethics [1675], I Pr 08) by Beth Lord - Spinoza's Ethics 1 P11
     A reaction: Does this say anything?
Substance is that of which an independent conception can be formed [Spinoza]
     Full Idea: By substance I mean that which is in itself, and is conceived through itself; in other words, that of which a conception can be formed independently of any other conception.
     From: Baruch de Spinoza (The Ethics [1675], I Def 3)
     A reaction: A striking blurring of epistemology and ontology. He eventually settles for it being a concept rather than a fact of nature. It still begs a thousand questions, but it probably leads to monads and logical atoms.
9. Objects / B. Unity of Objects / 3. Unity Problems / e. Vague objects
All communication is vague, and is outside the principle of non-contradiction [Peirce]
     Full Idea: The 'vague' might be defined as that to which the principle of contradiction does not apply. For it is false neither that an animal (in a vague sense) is male, nor that an animal is female. No communication between persons can be entirely non-vague.
     From: Charles Sanders Peirce (Critical Common-Sensism [1905], I)
     A reaction: Note that he makes vagueness largely a matter of the way we talk, which is David Lewis's approach, and looks right to me.
Vagueness is a neglected but important part of mathematical thought [Peirce]
     Full Idea: Logicians have too much neglected the study of vagueness, not suspecting the important part it plays in mathematical thought. It is the antithetical analogue of generality.
     From: Charles Sanders Peirce (Critical Common-Sensism [1905], I)
9. Objects / D. Essence of Objects / 1. Essences of Objects
The essence of a thing is what is required for it to exist or be conceived [Spinoza]
     Full Idea: Many assert that that without which a thing cannot be nor be conceived, belongs to the essence of that thing.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 10)
     A reaction: This is one Aristotelian idea that won't go away, despite the seventeenth century onslaught. It seems obvious that natural kinds, natural objects and human artefacts have properties that can be divided into essential and non-essential.
9. Objects / D. Essence of Objects / 6. Essence as Unifier
Essence gives existence and conception to things, and is inseparable from them [Spinoza]
     Full Idea: To the essence of anything pertains ...that without which the thing can neither be nor be conceived, and which in its turn cannot be nor be conceived without the thing.
     From: Baruch de Spinoza (The Ethics [1675], II Def 2)
     A reaction: Note that essence concerns not only what things are, but also our ability to conceive them.
9. Objects / D. Essence of Objects / 7. Essence and Necessity / b. Essence not necessities
Nothing is essential if it is in every part, and is common to everything [Spinoza]
     Full Idea: That which is common to everything, and which is equally in the part and in the whole, forms the essence of no individual thing.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 37)
     A reaction: I like this, because treating essences as mere necessary properties threatens to include utter trivia and universal generalities, just because they are necessary. Rejecting things as 'trivial' by stipulation won't do.
9. Objects / D. Essence of Objects / 8. Essence as Explanatory
All natures of things produce some effect [Spinoza]
     Full Idea: Nothing exists from whose nature an effect does not follow.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 36)
     A reaction: I take it that this is because it is analytic that essences produce effects, since that is the point of the concept of an essence - as the source of the explanations of the effects.
9. Objects / D. Essence of Objects / 14. Knowledge of Essences
Experience does not teach us any essences of things [Spinoza]
     Full Idea: Experience does not teach us any essences of things.
     From: Baruch de Spinoza (Letters to De Vries [1664], 1664?)
     A reaction: This, along with Leibniz's claim that experience cannot reveal necessities, may constitute a striking criticism of empiricism, but it invites the obvious reply 'so much the worse for essences'. An essence seems to be a theoretical concept, not a priori.
9. Objects / E. Objects over Time / 11. End of an Object
Only an external cause can destroy something [Spinoza]
     Full Idea: A thing cannot be destroyed except by an external cause.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 04)
9. Objects / F. Identity among Objects / 7. Indiscernible Objects
There cannot be two substances with the same attributes [Spinoza]
     Full Idea: In nature there cannot be two or more substances of the same nature or attribute.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 05)
     A reaction: This is the Identity of Indiscernibles.
9. Objects / F. Identity among Objects / 8. Leibniz's Law
Two substances can't be the same if they have different attributes [Spinoza]
     Full Idea: Two substances having different attributes have nothing in common with one another.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 02)
     A reaction: This is the contrapositive of Leibniz's Law (i.e of the Indiscernibility of Identicals). Same things must have same attributes, so if the attributes differ they can't be the same things.
10. Modality / A. Necessity / 10. Impossibility
Things are impossible if they imply contradiction, or their production lacks an external cause [Spinoza]
     Full Idea: A thing is said to be impossible either because the essence of the thing itself or its definition involves a contradiction, or because no external cause exists determinate to the production of such a thing.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 33)
     A reaction: Is the contradiction in nature or in logic? How can he be sure that there doesn't exist some causeless thing?
10. Modality / B. Possibility / 1. Possibility
Some logical possibility concerns single propositions, but there is also compatibility between propositions [Peirce]
     Full Idea: Many say everything is logically possible which involves no contradiction. In this sense two contradictory propositions may be severally possible. In the substantive sense, the contradictory of a possible proposition is impossible (if we were omniscient).
     From: Charles Sanders Peirce (The Nature of Mathematics [1898], III)
10. Modality / B. Possibility / 5. Contingency
Contingency is an illusion, resulting from our inadequate understanding [Spinoza, by Cottingham]
     Full Idea: The common notion of 'contingency' is for Spinoza an illusion, which derives from the fact that our view of reality is often inadequate and incomplete.
     From: report of Baruch de Spinoza (The Ethics [1675]) by John Cottingham - The Rationalists p.8
     A reaction: The crux is if there could another universe with different natural laws. Spinoza is in no position to deny the possibility. Cosmologists assume it is possible, and run computer simulations to test it. There is 'metaphysical' and 'natural' necessity.
We only call things 'contingent' in relation to the imperfection of our knowledge [Spinoza]
     Full Idea: A thing can in no respect be called contingent, save in relation to the imperfection of our knowledge.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 33)
     A reaction: A very good remark. Growing up is largely a realisation of the necessity of human affairs that you thought could be otherwise. (Forgive the pessimism!) As metaphysics, I find this appealing, too.
Reason naturally regards things as necessary, and only imagination considers them contingent [Spinoza]
     Full Idea: It is not in the nature of reason to regard things as contingent, but as necessary; ..hence, it is only through our imagination that we consider things, whether in respect to the future or to the past, as contingent.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 44)
     A reaction: A very interesting claim, which seems to be central to rationalism. The empiricist response must be that imagination (which is founded on experience) is a better guide to metaphysical status than pure reason can ever be.
10. Modality / B. Possibility / 7. Chance
Objective chance is the property of a distribution [Peirce]
     Full Idea: Chance, as an objective phenomenon, is a property of a distribution. ...In order to have any meaning, it must refer to some definite arrangement of all the things.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], VI)
Is chance just unknown laws? But the laws operate the same, whatever chance occurs [Peirce]
     Full Idea: Chance is the name for some law that is unknown to us? If you say 'each die moves under the influence of precise mechanical laws', it seems to me it is not these laws which made the tie turn up sixes, for the laws act the same when other throws come up.
     From: Charles Sanders Peirce (The Doctrine of Necessity Examined [1892], p.333)
10. Modality / B. Possibility / 8. Conditionals / d. Non-truthfunction conditionals
Truth-functional conditionals have a simple falsification, when A is true and B is false [Peirce]
     Full Idea: The utility of [truth-functional conditionals] is that it puts us in possession of a rule...[namely] The hypothetical proposition may be ...falsified by a single state of things, but only by one in which A [antecedent] is true and B [consequent] is false.
     From: Charles Sanders Peirce (On the Algebra of Logic [1895], p.218), quoted by Stephen Mumford - Dispositions
     A reaction: Personally I am rather more interested in verifying conditionals than in falsifying them. I certainly don't accept them until they are falsified, unless they have massive support from surrounding facts.
10. Modality / B. Possibility / 8. Conditionals / e. Supposition conditionals
In ordinary language a conditional statement assumes that the antecedent is true [Peirce]
     Full Idea: In our ordinary use of language we always understand the range of possibility in such a sense that in some possible case the antecedent shall be true.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], II)
     A reaction: Peirce is discussing Diodorus, and proposes the view nowadays defended by Edgington, though in the end Peirce defends the standard material conditional as simpler. I suspect that this discussion by Peirce is not well known.
10. Modality / C. Sources of Modality / 1. Sources of Necessity
Divine nature makes all existence and operations necessary, and nothing is contingent [Spinoza]
     Full Idea: All things are conditioned by the necessity of the divine nature, not only to exist, but also to exist and operate in a particular manner, and there is nothing that is contingent.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 29)
     A reaction: This obviously invites the response of the empiricist: how does he know that? Hume says he can't know it, and Leibniz says he knows it a priori. Traditionally, 'necessary' is the dubious term, but maybe it is 'contingent' which is meaningless.
10. Modality / C. Sources of Modality / 6. Necessity from Essence
Necessity is in reference to essence or to cause [Spinoza]
     Full Idea: A thing is called necessary either in reference to its essence or its cause.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 33)
     A reaction: I like any proposal that necessity should be 'in reference to' something, rather than being free-standing. I like to add necessary 'for' something, which is often conceptual necessity. Roots are necessary for trees.
10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / a. Conceivable as possible
People who are ignorant of true causes imagine anything can change into anything else [Spinoza]
     Full Idea: Those who are ignorant of true causes make complete confusion - thinking that trees might talk just as well as men, that men might be formed from stones as well as seed, and imagine that any form might be changed into any other.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 08 n2)
     A reaction: Spinoza himself can be guilty of this, but it strikes me as a key idea. Humean scepticism about causation seems to me the product of eighteenth century ignorance about the mechanisms of cause and effect which have since been uncovered by science.
Error does not result from imagining, but from lacking the evidence of impossibility [Spinoza]
     Full Idea: The mind does not err from the fact that it imagines, but only insofar as it is considered to lack an idea which excludes the existence of those things which it imagines to be present to it.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 17 s)
     A reaction: These may be the wisest words I have yet found on conceivability and possibility. My example is imagining a bonfire on the moon, which seems possible until you fully grasp what fire is.
10. Modality / E. Possible worlds / 1. Possible Worlds / d. Possible worlds actualism
The possible can only be general, and the force of actuality is needed to produce a particular [Peirce]
     Full Idea: The possible is necessarily general…..It is only actuality, the force of existence, which bursts the fluidity of the general and produces a discrete unit.
     From: Charles Sanders Peirce (works [1892]), quoted by François Recanati - Mental Files 13.1
     A reaction: [Papers 4 1967:147] This was quoted by Prior, and is often cited. Recanati is interested in the notion of a singular thought being tied to actuality, by generating a mental file.
10. Modality / E. Possible worlds / 3. Transworld Objects / a. Transworld identity
A horse would be destroyed if it were changed into a man or an insect [Spinoza]
     Full Idea: A horse would as much be destroyed if it were changed into a man as if it were changed into an insect.
     From: Baruch de Spinoza (The Ethics [1675], IV Pref)
     A reaction: He has been referring to essences of things. What if a shire horse is changed into a Shetland pony? If you watched the horse transmute, it would be continuous in a way that two separate creatures are not. Some sort of sameness there.
10. Modality / E. Possible worlds / 3. Transworld Objects / e. Possible Objects
A thing is contingent if nothing in its essence determines whether or not it exists [Spinoza]
     Full Idea: I call individual things contingent in so far as we discover nothing, whilst we attend to their essence alone, which necessarily posits their existence or which necessarily excludes it.
     From: Baruch de Spinoza (The Ethics [1675], IV Def 3)
     A reaction: So something could have an essence which determined that it could not exist, which is presumably a contradiction. That's a very strange sort of essence. Presumably all intrinsically contradictory essences are in some way the same.
11. Knowledge Aims / A. Knowledge / 1. Knowledge
Spinoza's three levels of knowledge are perception/imagination, then principles, then intuitions [Spinoza, by Scruton]
     Full Idea: For Spinoza there are three levels of knowledge: first, sense perception or imagination, second, reasoned reflection leading to principles, and third (the highest), intuition, in which the adequacy of an idea is immediately known.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Roger Scruton - Short History of Modern Philosophy §5.6
     A reaction: This notion of rising levels of knowledge has an obvious background in Plato. The third level is clearly rationalist, where empiricists would probably never aspire to rise above level two. I share the empiricist suspicion of level three.
11. Knowledge Aims / A. Knowledge / 2. Understanding
Understanding is the sole aim of reason, and the only profit for the mind [Spinoza]
     Full Idea: All efforts which we make through reason are nothing but efforts to understand, and the mind, in so far as it uses reason, adjudges nothing as profitable to itself excepting that which conduces to understanding.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 26)
     A reaction: I wish philosophers would agree that the aim of their subject is to achieve broad and general understanding of reality - and nothing else. If you want to change the world, that isn't philosophy. If you think understanding is impossible, drop philosophy.
Our whole conception of an object is its possible practical consequences [Peirce]
     Full Idea: Consider what effects, which might conceivably have practical bearings, we conceive the objects of our conceptions to have. Then, our conception of these effects is the whole of our conception of the object.
     From: Charles Sanders Peirce (How to Make our Ideas Clear [1878], EP i.132), quoted by Albert Atkin - Peirce 2 'early'
     A reaction: This is his 1878 version, which was fine-tuned later in life. He seems to have extended his principle to include possibilities, as well as the mere objects. That is, he moved beyond mere nominalism.
11. Knowledge Aims / A. Knowledge / 4. Belief / b. Elements of beliefs
We are aware of beliefs, they appease our doubts, and they are rules of action, or habits [Peirce]
     Full Idea: A belief has just three properties: first, it is something that we are aware of; second, it appeases the irritation of doubt; and, third, it involves the establishment in our nature of a rule of action, or, say for short, a habit.
     From: Charles Sanders Peirce (How to Make our Ideas Clear [1878], p.28)
     A reaction: Peirce probably believed that Bismarck breathed oxygen, but was unaware of his belief, and no one ever dreamed of acting on such a belief, unless Bismarck was gasping for air.
11. Knowledge Aims / A. Knowledge / 4. Belief / c. Aim of beliefs
The feeling of belief shows a habit which will determine our actions [Peirce]
     Full Idea: The feeling of believing is a more or less sure indication of there being established in our nature some habit which will determine our actions. Doubt never has such an effect.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.10)
     A reaction: It is one thing to assert this fairly accurate observation, and another to assert that this is the essence or definition of a belief. Perhaps it is the purpose of belief, without being the phenomenological essence of it. We act in states of uncertainty.
We are entirely satisfied with a firm belief, even if it is false [Peirce]
     Full Idea: As soon as a firm belief is reached we are entirely satisfied, whether the belief be true or false.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.10)
     A reaction: This does not deny that the truth or falsehood of a belief is independent of whether we are satisfied with it. It is making a fair point, though, about why we believe things, and it can't be because of truth, because we don't know how to ensure that.
We want true beliefs, but obviously we think our beliefs are true [Peirce]
     Full Idea: We seek for a belief that we shall think to be true; but we think each one of our beliefs to be true, and, indeed, it is mere tautology to say so.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.11)
     A reaction: If, as I do, you like to define belief as 'commitment to truth', Peirce makes a rather startling observation. You are rendered unable to ask whether your beliefs are true, because you have defined them as true. Nice point…
A mere question does not stimulate a struggle for belief; there must be a real doubt [Peirce]
     Full Idea: The mere putting of a proposition into the interrogative form does not stimulate the mind to any struggle after belief; there must be a real and living doubt.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.11)
     A reaction: This the attractive aspect of Peirce's pragmatism, that he is always focusing on real life rather than abstract theory or pure logic.
A 'belief' is a habit which determines how our imagination and actions proceed [Peirce]
     Full Idea: A cerebral habit of the highest kind, which will determine what we do in fancy as well as what we do in action, is called a 'belief'.
     From: Charles Sanders Peirce (What is a Leading Principle? [1880], I)
We act on 'full belief' in a crisis, but 'opinion' only operates for trivial actions [Peirce]
     Full Idea: 'Full belief' is willingness to upon a proposition in vital crises, 'opinion' is willingness to act on it in relatively insignificant affairs. But pure science has nothing at all to do with action.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: A nice clear statement of the pragmatic view of beliefs. It is not much help in distinguishing full belief about the solar system from mere opinion about remote galaxies. Ditto for historical events.
11. Knowledge Aims / A. Knowledge / 4. Belief / e. Belief holism
Unlike Descartes' atomism, Spinoza held a holistic view of belief [Spinoza, by Schmid]
     Full Idea: Unlike Descartes, who held an atomist theory of belief (that we can assent to a belief quite independently of our other beliefs), Spinoza endorsed a holistic theory of belief - that our degree of affirmation is essentially determined by our other ideas.
     From: report of Baruch de Spinoza (The Ethics [1675], II Pr 49S) by Stephan Schmid - Faculties in Early Modern Philosophy 3
     A reaction: Since I am a fan of the coherence theory of justification, I seem obligated to accept a fairly holistic account of the acceptance of beliefs. Descartes is a foundationalist.
11. Knowledge Aims / B. Certain Knowledge / 1. Certainty
True ideas intrinsically involve the highest degree of certainty [Spinoza]
     Full Idea: No one who has a true idea is ignorant that a true idea involves the highest certitude; to have a true idea signifying just this, to know a thing perfectly or as well as possible.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 43)
     A reaction: This wildly optimistic view is found in rationalists of the period. Rationalism only becomes tolerable if fallibilism is added to it. See Bonjour.
You only know you are certain of something when you actually are certain of it [Spinoza]
     Full Idea: Who can know that he understands some thing unless he first understands it? That is, who can know that he is certain about some thing unless he is first certain about it?
     From: Baruch de Spinoza (The Ethics [1675], II Pr 43S)
     A reaction: This seems to beg the question, which concerns how you get to the state of full understanding or certainty in the first place. Spinoza thinks only certainty counts as knowledge, which seems to derive from Descartes. I prefer Peirce.
A man who assents without doubt to a falsehood is not certain, but lacks a cause to make him waver [Spinoza]
     Full Idea: When we say that a man assents to what is false and does not doubt it, we do not say that he is certain, but merely that he does not doubt, that is, that he assents to what is false, because there are no causes sufficient to make his imagination waver.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 49)
     A reaction: This is a seventeenth century rationalist desperate to say that the reason can deliver certainty, in the face of idiots who are totally certain about astrology, fairies and what not. Vain hope, I'm afraid. Fallibilist rationalism is required.
11. Knowledge Aims / B. Certain Knowledge / 3. Fallibilism
Inquiry is not standing on bedrock facts, but standing in hope on a shifting bog [Peirce]
     Full Idea: Inquiry is not standing upon a bedrock of fact. It is walking up a bog, and can only say, this ground seems to hold for the present. Here I will stay until it begins to give way.
     From: Charles Sanders Peirce (works [1892], CP 5.589), quoted by Gottfried Leibniz - Letter to Newton 4
     A reaction: [I don't know which article this lovely quote comes from]
Reasoning is based on statistical induction, so it can't achieve certainty or precision [Peirce]
     Full Idea: All positive reasoning is judging the proportion of something in a whole collection by the proportion found in a sample. Hence we can never hope to attain absolute certainty, absolute exactitude, absolute universality.
     From: Charles Sanders Peirce (Scientific Attitude and Fallibilism [1899], II)
     A reaction: This is the basis of Peirce's fallibilism - that all 'positive' reasoning (whatever that it?) is based on statistical induction. I'm all in favour of fallibilism, but find Peirce's claim to be a bit too narrow. He was too mesmerised by physical science.
Infallibility in science is just a joke [Peirce]
     Full Idea: Infallibility in scientific matters seems to me irresistibly comical.
     From: Charles Sanders Peirce (Concerning the Author [1897], p.3)
11. Knowledge Aims / B. Certain Knowledge / 5. Cogito Critique
'I think' is useless, because it is contingent, and limited to the first person [Spinoza, by Scruton]
     Full Idea: The proposition 'I think' was useless to Spinoza, because it expresses a merely contingent proposition, where certainty must be founded in necessity, and because it refers to the first person, when truth comes from rising above our own mentality.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Roger Scruton - Short History of Modern Philosophy Ch.5
     A reaction: I find both of these criticisms very appealing. One might simply say that the starting point of philosophy is not the process of thinking, but the contents of thinking. Descartes' move is like astronomers becoming obsessed with telescopes.
12. Knowledge Sources / A. A Priori Knowledge / 3. Innate Knowledge / a. Innate knowledge
Innate truths are very uncertain and full of error, so they certainly have exceptions [Peirce]
     Full Idea: It seems to me there is the most historic proof that innate truths are particularly uncertain and mixed up with error, and therefore a fortiori not without exception.
     From: Charles Sanders Peirce (Scientific Attitude and Fallibilism [1899], II)
12. Knowledge Sources / B. Perception / 5. Interpretation
If the body is affected by an external object, the mind can't help believing that the object exists [Spinoza]
     Full Idea: If the human body is affected in a manner which involves the nature of any external body, the human mind will regard the said external body as actually existing.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 17)
     A reaction: This is like one of Hume's 'natural beliefs', and seems to me a powerful idea. One of the basic questions of epistemology is, apart from the question 'which beliefs can I justify?', also 'which beliefs can I never abandon?' Skip the scepticism?
12. Knowledge Sources / C. Rationalism / 1. Rationalism
The eyes of the mind are proofs [Spinoza]
     Full Idea: The eyes of the mind … are none other than proofs.
     From: Baruch de Spinoza (The Ethics [1675], V Pr 23)
     A reaction: A wonderful slogan for rationalists! Technically it sounds a bit dodgy, as steps seem to be required for a proof, whereas the eyes of the mind presumably offer a priori intuitions, or clear and distinct conceptions. In essence, he is right.
12. Knowledge Sources / D. Empiricism / 1. Empiricism
Experience is indeed our only source of knowledge, provided we include inner experience [Peirce]
     Full Idea: If Mill says that experience is the only source of any kind of knowledge, I grant it at once, provided only that by experience he means personal history, life. But if he wants me to admit that inner experience is nothing, he asks what cannot be granted.
     From: Charles Sanders Peirce (The Nature of Mathematics [1898])
     A reaction: Notice from Idea 14785 that Peirce has ideas in mind, and not just inner experiences like hunger. Empiricism certainly begins to look more plausible if we expand the notion of experience. It must include what we learned from prior experience.
12. Knowledge Sources / D. Empiricism / 2. Associationism
Once we have experienced two feelings together, one will always give rise to the other [Spinoza]
     Full Idea: If the mind has once been affected by two affects at once, then afterwards, when it is affected by one of them, it will also be affected by the other.
     From: Baruch de Spinoza (The Ethics [1675], III Pr14)
     A reaction: This strikes me as better expressed than Hume's version, which relies on examples. It is more generalised than Hume, since it will cover contiguity and resemblance and causation, all under the heading of the arising affects.
We talk of 'association by resemblance' but that is wrong: the association constitutes the resemblance [Peirce]
     Full Idea: Allying certain ideas like 'crimson' and 'scarlet' is called 'association by resemblance'. The name is not a good one, since it implies that resemblance causes association, while in point of fact it is the association which constitutes the resemblance.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], VII)
     A reaction: I take it that Hume would have agreed with this. It is an answer to Russell's claim that 'resemblance' must itself be a universal.
Association of ideas is the best philosophical idea of the prescientific age [Peirce]
     Full Idea: The doctrine of the association of ideas is, to my thinking, the finest piece of philosophical work of the prescientific ages.
     From: Charles Sanders Peirce (Concerning the Author [1897], p.2)
12. Knowledge Sources / D. Empiricism / 3. Pragmatism
Instead of seeking Truth, we should seek belief that is beyond doubt [Peirce]
     Full Idea: Your problems would be greatly simplified, if, instead of saying that you want to know the Truth, you were simply to say that you want to attain a state of belief unassailable beyond doubt.
     From: Charles Sanders Peirce (Essentials of Pragmatism [1905], I)
     A reaction: This is not the same as saying that belief beyond doubt IS truth. He is merely offering a strategy for scientists to side-step the sort of scepticism raised by Descartes and radical empiricists.
Pragmatism is a way of establishing meanings, not a theory of metaphysics or a set of truths [Peirce]
     Full Idea: Pragmatism is no doctrine of metaphysics, no attempt to determine the truth of things. It is merely a method of ascertaining the meanings of hard words and of abstract concepts.
     From: Charles Sanders Peirce (Pragmatism in Retrospect [1906], p.271)
     A reaction: Suddenly I recognise a prominent strand of modern philosophy of language (especially in America) for what it is.
12. Knowledge Sources / D. Empiricism / 5. Empiricism Critique
The world is one of experience, but experiences are always located among our ideas [Peirce]
     Full Idea: The real world is the world of sensible experience, and it is part of the process of sensible experience to locate its facts in the world of ideas.
     From: Charles Sanders Peirce (The Nature of Mathematics [1898], III)
     A reaction: This is the neatest demolition of the sharp dividing line between empiricism and rationalism that I have ever encountered.
12. Knowledge Sources / E. Direct Knowledge / 3. Inspiration
A truth is hard for us to understand if it rests on nothing but inspiration [Peirce]
     Full Idea: A truth which rests on the authority of inspiration only is of a somewhat incomprehensible nature; and we can never be sure that we rightly comprehend it.
     From: Charles Sanders Peirce (Scientific Attitude and Fallibilism [1899], II)
If we decide an idea is inspired, we still can't be sure we have got the idea right [Peirce]
     Full Idea: Even if we decide that an idea really is inspired, we cannot be sure, or nearly sure, that the statement is true. We know one of the commandments of the Bible was printed without a 'not' in it.
     From: Charles Sanders Peirce (Scientific Attitude and Fallibilism [1899], II)
Only reason can establish whether some deliverance of revelation really is inspired [Peirce]
     Full Idea: We never can be absolutely certain that any given deliverance [of revelation] really is inspired; for that can only be established by reasoning.
     From: Charles Sanders Peirce (Scientific Attitude and Fallibilism [1899], II)
13. Knowledge Criteria / A. Justification Problems / 3. Internal or External / a. Pro-internalism
Anyone who knows, must know that they know, and even know that they know that they know.. [Spinoza]
     Full Idea: If a man knows anything, he, by that very fact, knows that he knows it, and at the same time knows that he knows that he knows it, and so on to infinity.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 21)
     A reaction: A delightfully bold claim! This is 'super internalism', but it seems to require that we must be certain in order to know, whereas I think my own view is internalist but 'fallibilist' - I know, while admitting I could be wrong.
13. Knowledge Criteria / B. Internal Justification / 2. Pragmatic justification
We need our beliefs to be determined by some external inhuman permanency [Peirce]
     Full Idea: It is necessary that a method should be found by which our beliefs be determined by nothing human, but by some external permanency - by something upon which our thinking has no effect.
     From: Charles Sanders Peirce (The Fixation of Belief [1877]), quoted by Robert Fogelin - Walking the Tightrope of Reason Ch.5
     A reaction: This very sensible and interesting remark hovers somewhere between empiricism and pragmatism. Fogelin very persuasively builds his account of knowledge on it. The key point is that we hardly ever choose what to believe. See Idea 2454.
13. Knowledge Criteria / B. Internal Justification / 3. Evidentialism / a. Evidence
Scientists will give up any conclusion, if experience opposes it [Peirce]
     Full Idea: The scientific man is not in the least wedded to his conclusions. He risks nothing upon them. He stands ready to abandon one or all as experience opposes them.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: In the age of massive speculative research grants, the idea that 'he risks nothing upon them' is no longer true. Ditto for building aircraft and bridges, which are full of theoretical science. Notoriously, many scientists don't live up to Peirce's idea.
13. Knowledge Criteria / B. Internal Justification / 4. Foundationalism / b. Basic beliefs
Demonstration does not rest on first principles of reason or sensation, but on freedom from actual doubt [Peirce]
     Full Idea: It is a common idea that demonstration must rest on indubitable propositions, either first principles of a general nature, or first sensations; but actual demonstration is completely satisfactory if it starts from propositions free from all actual doubt.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.11)
     A reaction: Another nice example of Peirce focusing on the practical business of thinking, rather than abstract theory. I agree with this approach, that explanation and proof do not aim at perfection and indubitability, but at what satisfies a critical mind.
13. Knowledge Criteria / B. Internal Justification / 5. Coherentism / b. Pro-coherentism
Encounters with things confuse the mind, and internal comparisons bring clarity [Spinoza]
     Full Idea: The mind has only a confused knowledge of itself, its own body, and external bodies, as long as it is perceived from fortuitous encounters with things, ...and not internally, from the agreements, differences and oppositions of a number of things at once.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 29s)
     A reaction: [compressed] This is a very nice expression of the commitment to coherence as justification, typical of the rationalist view of things. Empiricists are trapped in an excessively atomistic concept of knowledge (one impression or sense datum at a time).
13. Knowledge Criteria / C. External Justification / 1. External Justification
Doubts should be satisfied by some external permanency upon which thinking has no effect [Peirce]
     Full Idea: To satisfy our doubts it is necessary that a method should be found by which our beliefs may be determined by nothing human, but by some external permanency - by something upon which our thinking has no effect.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.18)
     A reaction: This may be the single most important idea in pragmatism and in the philosophy of science. See Fodor on experiments (Idea 2455). Put the question to nature. The essential aim is to be passive in our beliefs - just let reality form them.
13. Knowledge Criteria / D. Scepticism / 1. Scepticism
Anaxarchus said that he was not even sure that he knew nothing [Anaxarchus, by Diog. Laertius]
     Full Idea: Anaxarchus said that he was not even sure that he knew nothing.
     From: report of Anaxarchus (fragments/reports [c.340 BCE]) by Diogenes Laertius - Lives of Eminent Philosophers 09.10.1
13. Knowledge Criteria / D. Scepticism / 6. Scepticism Critique
Once doubt ceases, there is no point in continuing to argue [Peirce]
     Full Idea: Some people seem to love to argue a point after all the world is fully convinced of it. But no further advance can be made. When doubt ceases, mental action on the subject comes to an end; and, if it did go on, it would be without purpose.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.11)
     A reaction: This is the way Peirce's pragmatism, which deals with how real thinking actually works (rather than abstract logic), deals with scepticism. However, there is a borderline where almost everyone is satisfied, but the very wise person remains sceptical.
14. Science / A. Basis of Science / 2. Demonstration
If each inference slightly reduced our certainty, science would soon be in trouble [Peirce]
     Full Idea: Were every probable inference less certain than its premises, science, which piles inference upon inference, often quite deeply, would soon be in a bad way.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], IV)
     A reaction: This seems to endorse Aristotle's picture of demonstration about scientific and practical things as being a form of precise logic, rather than progressive probabilities. Our generalisations may be more certain than the particulars they rely on.
14. Science / B. Scientific Theories / 1. Scientific Theory
Duns Scotus offers perhaps the best logic and metaphysics for modern physical science [Peirce]
     Full Idea: The works of Duns Scotus have strongly influenced me. …His logic and metaphysics, torn away from its medievalism, …will go far toward supplying the philosophy which is best to harmonize with physical science.
     From: Charles Sanders Peirce (Concerning the Author [1897], p.2)
I classify science by level of abstraction; principles derive from above, and data from below [Peirce]
     Full Idea: I classify the sciences on Comte's general principles, in order of the abstractness of their objects, so that each science may largely rest for its principles upon those above it in the scale, while drawing its data in part from those below it.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: He places mathematics at the peak of abstraction. I assume physics is more abstract than biology. So chemistry draws principles from physics and data from biology. Not sure about this. Probably need to read Comte on it.
14. Science / C. Induction / 2. Aims of Induction
'Induction' doesn't capture Greek 'epagoge', which is singulars in a mass producing the general [Peirce]
     Full Idea: The word 'inductio' is Cicero's imitation of Aristotle's term 'epagoge'. It fails to convey the full significance of the Greek word, which implies the examples are arrayed and brought forward in a mass. 'The assault upon the generals by the singulars'.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], II)
     A reaction: Interesting, thought I don't think there is enough evidence in Aristotle to get the Greek idea fully clear.
14. Science / C. Induction / 3. Limits of Induction
How does induction get started? [Peirce]
     Full Idea: Induction can never make a first suggestion.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], II)
     A reaction: This seems to lead to the general modern problem of the 'theory-laden' nature of observation. You don't see anything at all without some idea of what you are looking for. How do you spot the 'next instance'. Instance of what? Nice.
Induction can never prove that laws have no exceptions [Peirce]
     Full Idea: Induction can never afford the slightest reason to think that a law is without an exception.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], II)
     A reaction: Part of the general Humean doubts about induction, but very precisely stated, and undeniable. You can then give up on universal laws, or look for deeper reasons to justify your conviction that there are no exceptions. E.g. observe mass, or Higgs Boson.
The worst fallacy in induction is generalising one recondite property from a sample [Peirce]
     Full Idea: The most dangerous fallacy of inductive reasoning consists in examining a sample, finding some recondite property in it, and concluding at once that it belongs to the whole collection.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], V)
     A reaction: The point, I take it, is not that you infer that the whole collection has all the properties of the sample, but that some 'recondite' or unusual property is sufficiently unusual to be treated as general.
14. Science / D. Explanation / 2. Types of Explanation / f. Necessity in explanations
To understand a phenomenon, we must understand why it is necessary, not merely contingent [Spinoza, by Cottingham]
     Full Idea: Adequate understanding of a phenomenon, for Spinoza, involves a complete understanding of its causes, and this in turn involves a dissolving of the illusion of contingency and a recognition of the necessity of its being thus and not otherwise.
     From: report of Baruch de Spinoza (The Ethics [1675]) by John Cottingham - The Rationalists p.168
     A reaction: This is the appeal of the rationalist dream. We want a god-like grasp of things, not a superficial perception of what seems to be going on.
14. Science / D. Explanation / 2. Types of Explanation / k. Explanations by essence
To understand the properties we must know the essence, as with a circle [Spinoza]
     Full Idea: If a circle is defined as a figure in which lines from centre to circumference are equal, such definitions do not explain the essence of a circle, but only a property. The properties of a thing are not understood as long as their essences are not known.
     From: Baruch de Spinoza (Improvement of Understanding [1675], §95), quoted by Cover,J/O'Leary-Hawthorne,J - Substance and Individuation in Leibniz 1.2.1
     A reaction: This is the traditional Aristotelian view of essence, and the example of a circle is nice, though I am not sure what the essence of a circle might be. Presumably ALL the properties of a circle must flow from it.
14. Science / D. Explanation / 3. Best Explanation / a. Best explanation
'Abduction' is beginning a hypothesis, particularly if it includes preference of one explanation over others [Peirce]
     Full Idea: The first starting of a hypothesis and the entertaining of it …is an inferential step which I propose to call 'abduction'. This will include a preference for any one hypothesis over others which would equally explain the facts.
     From: Charles Sanders Peirce (Abduction and Induction [1901], I)
     A reaction: I take there to be no more important function within human thought than the procedure by which we give preference to one particular explanation. It only makes sense, I think, if we take it as part of a coherence theory of justification.
Abduction involves original suggestions, and not just the testing involved in induction [Peirce]
     Full Idea: It is of the nature of abduction to involve an original suggestion; while typical induction has no originality in it, but only tests a suggestion already made.
     From: Charles Sanders Peirce (Abduction and Induction [1901], I)
     A reaction: Peirce's 'abduction' is not, then, just the choice of a best explanation. He came up with the idea because he was keen to capture the creative and imaginative character of rational thought.
14. Science / D. Explanation / 4. Explanation Doubts / b. Rejecting explanation
Men often answer inner 'whys' by treating unconscious instincts as if they were reasons [Peirce]
     Full Idea: Men many times fancy that they act from reason, when the reasons they attribute to themselves are nothing but excuses which unconscious instinct invents to satisfy the teasing 'whys' of the ego.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: A strikely modern thought, supported by a lot of modern neuro-science and psychology. It is crucial to realise that we don't have to accept the best explanation we can think of.
15. Nature of Minds / A. Nature of Mind / 1. Mind / a. Mind
The human mind is the very idea or knowledge of the human body [Spinoza]
     Full Idea: The human mind is the very idea or knowledge of the human body.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 19)
     A reaction: This is close to Aristotle's claim that the 'psuché' is the 'form' of the body. Spinoza is appealingly modern in his view. The mapping of the body (our prioprioceptic sense) strikes me as central to the nature of the mind.
15. Nature of Minds / A. Nature of Mind / 1. Mind / b. Purpose of mind
Knowledge is the essence of the mind [Spinoza]
     Full Idea: The essence of our mind consists solely in knowledge.
     From: Baruch de Spinoza (The Ethics [1675], V Pr 36 n)
     A reaction: This is in a context of discussing the human relation to God. See Keith Hossack's 'The Metaphysics of Knowledge' for an exploration of this idea. (@BenedictSpinoza came up with this one)
15. Nature of Minds / A. Nature of Mind / 1. Mind / c. Features of mind
Will and intellect are the same thing [Spinoza]
     Full Idea: The will and the intellect are one and the same.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 49)
The will is finite, but the intellect is infinite [Spinoza]
     Full Idea: The will is distinguished from the intellect, the latter being finite, the former infinite.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 49)
The will is not a desire, but the faculty of affirming what is true or false [Spinoza]
     Full Idea: By the will I understand a faculty of affirming or denying, but not a desire; a faculty, I say, by which the mind affirms or denies that which is true or false.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 48)
     A reaction: This is to be compared with the empiricist tendency to say that there are nothing but desires. On the whole I'm with Spinoza here. Hobbes thinKs of actions in the world, but Spinoza sees the will as operating in the process of reasoning.
15. Nature of Minds / A. Nature of Mind / 5. Unity of Mind
Spinoza held that the mind is just a bundle of ideas [Spinoza, by Schmid]
     Full Idea: Spinoza held a bundle theory of the mind, according to which our mind is but a bundle 'composed of a great many ideas'.
     From: report of Baruch de Spinoza (The Ethics [1675], II Pr 15) by Stephan Schmid - Faculties in Early Modern Philosophy 3
     A reaction: This seems to imply that the mind lacks unity, and also lacks a Self. Spinoza doesn't say much about this view.
15. Nature of Minds / A. Nature of Mind / 7. Animal Minds
Animals are often observed to be wiser than people [Spinoza]
     Full Idea: Many things are observed in brutes which far surpass human sagacity.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 02)
     A reaction: Lovely - especially in an age when animals were being actively downgraded (e.g. by Descartes) in order to upgrade man.
We may think animals reason very little, but they hardly ever make mistakes! [Peirce]
     Full Idea: Those whom we are so fond of referring to as the 'lower animals' reason very little. Now I beg you to observe that those beings very rarely commit a mistake, while we ---- !
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: We might take this as pessimism about reason, but I would take it as inviting a much broader view of rationality. I think nearly all animal behaviour is highly rational. Are animals 'sensible' in what they do? Their rationality is unadventurous.
15. Nature of Minds / B. Features of Minds / 1. Consciousness / d. Purpose of consciousness
To understand is the absolute virtue of the mind [Spinoza]
     Full Idea: To understand is the absolute virtue of the mind.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 28)
     A reaction: A possible epigraph for this website. Perhaps it should be required by law that this be printed on the frontispiece of every philosophy book ever published.
15. Nature of Minds / C. Capacities of Minds / 1. Faculties
Faculties are either fictions, or the abstract universals of ideas [Spinoza]
     Full Idea: Faculties are either complete fictions, or nothing but metaphysical beings or universals, which are used to forming from particulars (as 'stoneness' is to a stone).
     From: Baruch de Spinoza (The Ethics [1675], II Pr 48S), quoted by Stephan Schmid - Faculties in Early Modern Philosophy 3
     A reaction: So they are, at best, the sources of our concepts. Does that mean one faculty for each concept, or one huge concept-generating faculty?
15. Nature of Minds / C. Capacities of Minds / 2. Imagination
Only imagination can connect phenomena together in a rational way [Peirce]
     Full Idea: We can stare stupidly at phenomena; but in the absence of imagination they will not connect themselves together in any rational way.
     From: Charles Sanders Peirce (Scientific Attitude and Fallibilism [1899], I)
     A reaction: The importance of this is its connection between imagination and 'rational' understanding. This is an important corrective to a crude traditional picture of the role of imagination. I would connect imagination with counterfactuals and best explanation.
15. Nature of Minds / C. Capacities of Minds / 5. Generalisation by mind
Generalisation is the great law of mind [Peirce]
     Full Idea: The generalising tendency is the great law of mind.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], VII)
     A reaction: How else could a small and compact mind get a grip on a vast and diverse reality? This must even apply to inarticulate higher animals.
Generalization is the true end of life [Peirce]
     Full Idea: Generalization, the spelling out of continuous systems, in thought, in sentiment, in deed, is the true end of life.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], III)
     A reaction: I take understanding to be the true aim of life, and full grasp of particulars (e.g. of particular people) is as necessary as generalisation. This is still a very nice bold idea.
15. Nature of Minds / C. Capacities of Minds / 8. Remembering Contiguity
If the body is affected by two things together, the imagining of one will conjure up the other [Spinoza]
     Full Idea: If the human body has once been affected by two or more bodies at the same time, when the mind afterwards imagines any of them, it will straightway remember the other also.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 18)
     A reaction: Very interesting to see a great rationalist philosopher making an observation right at the heart of Hume's theory of knowledge (associationism). Clearly an associationist theory of psychology need not imply a materialist (connectionist) theory of mind.
15. Nature of Minds / C. Capacities of Minds / 10. Conatus/Striving
Our own force of persevering is nothing in comparison with external forces [Spinoza]
     Full Idea: The force by which a man perserveres in existing is limited, and infinitely surpassed by the power of external causes.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 03)
     A reaction: This states the obvious, but is important as a way of viewing things. I think Nietzsche's notion of Will to Power comes in here, as a unified account of both forces.
As far as possible, everything tries to persevere [Spinoza]
     Full Idea: Each thing, as far as it can by its own power, strives to persevere in its own being. ...[7] The striving by which each thing strives to persevere in its being is nothing but the actual essence of the thing.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 06)
     A reaction: This is covered by his word 'conatus'. Obviously this covers plants as well as sentient beings. Mountains have no power to persevere. Since Spinoza sees this as basic, he is not far from Nietzsche.
The conatus (striving) of mind and body together is appetite, which is the essence of man [Spinoza]
     Full Idea: When striving [conatus] is related to the Mind it is called Will, but when related to the Mind and Body it is called Appetite. This Appetite is the essence of man, from whose nature there necessarily follow those things that promote this preservation.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 09S), quoted by Stephan Schmid - Faculties in Early Modern Philosophy 3
     A reaction: Spinoza seems to see 'conatus' as a fairly unified thing, where Nietzsche sees the will to power as a combination of many competing 'drives'. I think Nietzsche is closer to the truth.
16. Persons / B. Nature of the Self / 7. Self and Body / a. Self needs body
The mind only knows itself by means of ideas of the modification of the body [Spinoza]
     Full Idea: The mind does not know itself, except in so far as it perceives the ideas of the modifications of the body.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 29)
     A reaction: This is reminiscent of Hume's 'bundle of perceptions' report of introspection. It is in tune with a modern 'animalist' view of a person, and with a view of the mind as a map of the body and its environs. Is he a sceptic about personal identity?
16. Persons / C. Self-Awareness / 2. Knowing the Self
Self-knowledge needs perception of the affections of the body [Spinoza]
     Full Idea: The mind does not know itself except in so far as it perceives the ideas of the affections of the body.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 23)
     A reaction: 'The ideas of the affections of the body' seems to be twice removed from the actual body, so I am not crystal clear what this says. The idea of knowing yourself with no involvement at all of the body seems absurd.
'Know yourself' is not introspection; it is grasping how others see you [Peirce]
     Full Idea: 'Know thyself' does not mean instrospect your soul. It means see yourself as others would see you if they were intimate enough with you.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], V)
     A reaction: When it comes to anger management, I would have thought that introspection had some use. You can see a tantrum coming before even your intimates can. Nice disagreement with Sartre! (Idea 7123)
16. Persons / D. Continuity of the Self / 2. Mental Continuity / a. Memory is Self
The poet who forgot his own tragedies was no longer the same man [Spinoza]
     Full Idea: Sometimes a man undergoes such changes that he cannot very well be said to be the same man, as was the case with a certain Spanish poet ...who was so oblivious of his past life that he did not believe the tales and tragedies he had composed were his own.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 39)
     A reaction: This seems to need Locke's distinction between 'man' and 'person', since the poor poet was clearly the same human being. Spinoza places huge emphasis on the intellect as the essence of the man.
16. Persons / F. Free Will / 1. Nature of Free Will
A thing is free if it acts by necessity of its own nature, and the act is determined by itself alone [Spinoza]
     Full Idea: That thing is called free which exists solely by the necessity of its own nature, and of which the action is determined by itself alone.
     From: Baruch de Spinoza (The Ethics [1675], I Def 7)
     A reaction: This points to the obvious thought that nothing is independent enough to achieve freedom. Our concept of nature is of almost endless interdependence. God seems the only thing that could possibly qualify, though some might say humans could.
16. Persons / F. Free Will / 2. Sources of Free Will
People are only free if they are guided entirely by reason [Spinoza]
     Full Idea: The only genuinely free person is one who lives with his entire mind guided solely by reason.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.10)
     A reaction: It strikes me as blatantly impossible to be entirely guided by reason. His point is that it is a subservience to reason which is entirely chosen. Why is that different from choosing to be entirely subservient to another person?
16. Persons / F. Free Will / 5. Against Free Will
A thing is free if it acts only by the necessity of its own nature [Spinoza]
     Full Idea: I say that a thing is free, which exists and acts solely by the necessity of its own nature.
     From: Baruch de Spinoza (Letter to G.H. Schaller [1674], 1674.10)
     A reaction: Of course, this isn't 'freedom' at all, but it seems to exactly right as an account of so-called freedom. In the case of a human being the 'necessity of our own nature' is character, and virtue and vice are the expressions of the necessities of character.
An act of will can only occur if it has been caused, which implies a regress of causes [Spinoza]
     Full Idea: Each volition can neither exist nor be determined to produce an effect unless it is determined by another cause, and this cause again by another, and so on, to infinity.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 32), quoted by Stephan Schmid - Faculties in Early Modern Philosophy 3
     A reaction: Acts of will are usually responses to situations, so it seems a bit simplistic to think that they are all spontaneous sui generis causal events. That argument won't work, of course, for a random volition that is out of context.
'Free will' is a misunderstanding arising from awareness of our actions, but ignorance of their causes [Spinoza]
     Full Idea: Men are mistaken in thinking themselves free; their opinion is made up of consciousness of their own actions, and ignorance of the causes by which they are conditioned.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 35)
     A reaction: I have recently come to totally agree with this. The whole concept of free will seems to me incoherent, and Spinoza pinpoints the error. We aren't equipped to know the origins of the thoughts that arrive in our consciousnesses.
Would we die if we lacked free will, and were poised between equal foods? Yes! [Spinoza]
     Full Idea: It may be objected, if a man does not act from free will, what will happen if the incentives to action are equally balanced, as in the case of Buridan's ass? Will he perish of hunger and thirst. ..Personally I am ready to admit that he would die.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 49)
     A reaction: A nicely defiant way of demonstrating his rejection of free will. I have to agree with him. Even if there were such a thing as 'free will', it is hard to see how it could act as a tie-breaker. Which way would it freely decide?
The mind is not free to remember or forget anything [Spinoza]
     Full Idea: It is not within the free power of the mind to remember or forget a thing at will.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 02)
     A reaction: An interesting little corrective if you were thinking that your total control over you mind proved that you had free will. Once you face up to your lack of control of the memory process, you begin to realise how little of your mind even feels controlled.
16. Persons / F. Free Will / 6. Determinism / a. Determinism
We think we are free because we don't know the causes of our desires and choices [Spinoza]
     Full Idea: Men think themselves free because they are conscious of their volitions and their appetites, yet never give a thought to the causes which dispose them to desire or to exercise the will as they do, since they are wholly unaware of them.
     From: Baruch de Spinoza (The Ethics [1675])
     A reaction: This encapsulates the determinist idea nicely. In the end we just choose, but we have no idea why we prefer one reason to another, or simply opt for one thing rather than another.
The actual world is the only one God could have created [Spinoza]
     Full Idea: Things could not have been brought into being by God in any manner or in any order different from that which has in fact obtained.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 33)
     A reaction: Said to be a "notorious" proposition. This is a key idea in philosophy because it represents (like solipsism) one of the extremes - there is no such thing as contingency, and that all things are necessary. It is daft not to take Spinoza seriously on this.
17. Mind and Body / A. Mind-Body Dualism / 1. Dualism
Physical and psychical laws of mind are either independent, or derived in one or other direction [Peirce]
     Full Idea: The question about minds is whether 1) physical and psychical laws are independent (monism, my neutralism), 2) the psychical laws derived and physical laws primordial (materialism), 3) physical law is derived, psychical law primordial (idealism).
     From: Charles Sanders Peirce (The Architecture of Theories [1891], p.321)
     A reaction: I think you are already in trouble when you start proposing that there are two quite distinct sets of laws, and then worry about how they are related. Assume unity, and only separate them when the science forces you to (which it won't).
17. Mind and Body / A. Mind-Body Dualism / 3. Panpsychism
Whatever is First must be sentient [Peirce]
     Full Idea: I think that what is First is ipso facto sentient.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], VIII)
     A reaction: He doesn't mention Leibniz's monads, but that looks like the ancestor of Peirce's idea. He doesn't make clear (here) how far he would take the idea. I would just say that whatever is 'First' must be active rather than passive.
17. Mind and Body / A. Mind-Body Dualism / 5. Parallelism
Ideas and things have identical connections and order [Spinoza]
     Full Idea: The order and connection of ideas is the same as the order and connection of things.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 07)
     A reaction: I hadn't registered until Beth Lord pointed it out that this is Spinoza's parallelism of the mental and the physicalism, which seems to be roughly the same as the views of Leibniz and Malebranche, but with a different explanation.
17. Mind and Body / A. Mind-Body Dualism / 8. Dualism of Mind Critique
Mind and body are one thing, seen sometimes as thought and sometimes as extension [Spinoza]
     Full Idea: The mind and the body are one and the same individual which is conceived now under the attribute of thought, now under the attribute of extension.
     From: Baruch de Spinoza (The Ethics [1675])
     A reaction: I suppose we might now call this 'property dualism'. It is odd that when you examine one property, the other is nowhere to be seen.
We are incapable of formulating an idea which excludes the existence of our body [Spinoza]
     Full Idea: An idea which excludes the existence of our body cannot be postulated in our mind, but is contrary thereto.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 10)
     A reaction: A fascinating claim. At the heart of Descartes is an unspoken thought experiment exploring the possibility of a disembodied mind. This is a beautiful challenge to the very concept of such a thing, and points to a grealty superior theory of mind.
17. Mind and Body / E. Mind as Physical / 1. Physical Mind
Mind and body are the same thing, sometimes seen as thought, and sometimes as extension [Spinoza]
     Full Idea: The idea of body and body, that is, mind and body, are one and the same individual conceived now under the attribute of thought, now under the attribute of extension.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 21)
     A reaction: This is an appealingly modern view, but a bit glib. Phenomenologically, the mind seen as thought and the body seen as extension are about as wildly different as it is possible to be. This needs explanation.
18. Thought / A. Modes of Thought / 3. Emotions / a. Nature of emotions
Emotion is a modification of bodily energy, controlling our actions [Spinoza]
     Full Idea: By emotion [affectus] I understand the modification of energy of the body by which the power of action is aided or restrained.
     From: Baruch de Spinoza (The Ethics [1675]), quoted by Robert C. Solomon - The Passions 3.4
     A reaction: [no ref given] Solomon gives this as the earliest version of the 'hydraulic' model of emotions, later found in Freud and Jung. Very unusual to give a wholly physical account of these psychic states.
18. Thought / A. Modes of Thought / 3. Emotions / e. Basic emotions
The three primary emotions are pleasure, pain and desire [Spinoza]
     Full Idea: I recognise only three primitive or primary emotions, namely, pleasure, pain and desire.
     From: Baruch de Spinoza (The Ethics [1675], IIIEm Df 4)
     A reaction: Interesting, but hard to justify. Presumably one can analyse fear as desire for no pain, and grief as desire for the return of pleasure, etc. It is a nice exercise in introspective psychology, but I don't feel much wiser for it.
The three primary emotions are pleasure, pain, and desire [Spinoza, by Goldie]
     Full Idea: Spinoza held that the three primary emotions are pleasure, pain, and desire
     From: report of Baruch de Spinoza (The Ethics [1675], III P59) by Peter Goldie - The Emotions 4 'Evidence'
     A reaction: If you are aiming for a minimal list, this is quite good. One active, one good passive, one bad passive. Output and input.
18. Thought / A. Modes of Thought / 3. Emotions / f. Emotion and reason
Minds are subject to passions if they have inadequate ideas [Spinoza]
     Full Idea: The mind is subject to passions in proportion to the number of inadequate ideas which it has.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 01)
     A reaction: An exceptionally intellectualist view of emotions!
An emotion is only bad if it hinders us from thinking [Spinoza]
     Full Idea: An emotion is only bad or hurtful, in so far as it hinders the mind from being able to think.
     From: Baruch de Spinoza (The Ethics [1675], V Pr 09)
     A reaction: This sounds sensible. It fits Spinoza's quasi-stoicism that he should be happy with emotion (as natural), but also that true 'living by nature' requires control by reason. Only a wild romantic would think emotion better than judgement as a guide.
18. Thought / A. Modes of Thought / 3. Emotions / g. Controlling emotions
Stoics want to suppress emotions, but Spinoza overcomes them with higher emotions [Spinoza, by Stewart,M]
     Full Idea: Spinoza says the only way to overcome emotions is with higher emotions, thus distinguishing himself from the Stoics, who argued that the only thing to do with the surly crowd of human emotions is to have them all shot.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Matthew Stewart - The Courtier and the Heretic Ch.10
     A reaction: The modern view would certainly be that the Stoics were responsible for massive problems in European civilization (thought the Buddhist have similar views). Emotions are now seen as integral even to very pure reasoning.
An emotion comes more under our control in proportion to how well it is known to us [Spinoza]
     Full Idea: An emotion becomes more under our control, and the mind is less passive in respect to it, in proportion as it is more known to us.
     From: Baruch de Spinoza (The Ethics [1675], V Pr 03)
     A reaction: This may sound a little optimistic, but it is also obviously true, in the sense that the only proper control we have of our own behaviour is through thought and judgement, which presuppose awareness of what needs controlling.
18. Thought / A. Modes of Thought / 5. Rationality / a. Rationality
Reasoning involves observation, experiment, and habituation [Peirce]
     Full Idea: The mental operations concerning in reasoning are three. The first is Observation; the second is Experimentation; and the third is Habituation.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], V)
     A reaction: I like the breadth of this. Even those who think scientific reasoning has priority over logic (as I do, thinking of it as the evaluation of evidence, with Sherlock Holmes as its role model) will be surprised to finding observation and habituation there.
18. Thought / A. Modes of Thought / 5. Rationality / b. Human rationality
Everybody overrates their own reasoning, so it is clearly superficial [Peirce]
     Full Idea: The very fact that everybody so ridiculously overrates his own reasoning, is sufficient to show how superficial the faculty is.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: A nice remark. The obvious counter-thought is that the collective reasoning of mankind really has been rather impressive, even though people haven't yet figured out how to live at peace with one another.
18. Thought / A. Modes of Thought / 6. Judgement / b. Error
People make calculation mistakes by misjudging the figures, not calculating them wrongly [Spinoza]
     Full Idea: When men make mistakes in calculation, they have one set of figures in their mind, and another on the paper. If we could see into their minds, they do not make a mistake.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 47)
     A reaction: A wonderfully optimistic assertion of faith in reason! He seems to imply an infallibility in reason, which seems a bit implausible. If I make 7+6=14, MUST I have muddled the 6 with a 7? Presumably Spinoza was good at arithmetic.
18. Thought / C. Content / 2. Ideas
Ideas are powerful entities, which can produce further ideas [Spinoza, by Schmid]
     Full Idea: Spinoza conceives of ideas as intrinsically powerful entities, which have a capacity to produce further ideas.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Stephan Schmid - Faculties in Early Modern Philosophy 6
     A reaction: Is the idea the source of the entire philosophy of Hegel? I find Hegel's claim to infer huge chains of ideas from very simple origins quite implausible. I also rather doubt whether a wholly isolated idea can produce a further idea.
An 'idea' is a mental conception which is actively formed by the mind in thinking [Spinoza]
     Full Idea: By 'idea', I mean the mental conception which is formed by the mind as a thinking thing (this is not a passive perception with regard to the object, but expresses an activity of the mind).
     From: Baruch de Spinoza (The Ethics [1675], II Def 3)
     A reaction: This is interesting as a seventeenth century attempt to grapple with the nature of thought. Spinoza sees it as of the essence of mind, since it is what the mind contributes, rather than what happens to the mind when it experiences.
Ideas are not images formed in the brain, but are the conceptions of thought [Spinoza]
     Full Idea: By ideas I do not mean images such as are formed at the back of the eye, or in the midst of the brain, but the conceptions of thought.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 48)
     A reaction: This appears to be equating 'ideas' with what we now call 'concepts', which presumably makes Spinoza less open to criticism than other philosophers of his time, for postulating baffling mental copies of the world.
An idea involves affirmation or negation [Spinoza]
     Full Idea: An idea, insofar as it is an idea, involves an affirmation or negation.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 49 sII)
     A reaction: Spinoza clearly distinguishes ideas from images, and here seems to identify ideas with propositions. Nowadays we say these are 'true or false', but Spinoza is more personal and psychological. I prefer his way of putting it.
18. Thought / D. Concepts / 3. Ontology of Concepts / b. Concepts as abilities
A 'conception', the rational implication of a word, lies in its bearing upon the conduct of life [Peirce]
     Full Idea: The present writer framed the theory that a 'conception', that is, the rational purport of a word or other expression, lies exclusively in its conceivable bearing upon the conduct of life.
     From: Charles Sanders Peirce (Essentials of Pragmatism [1905], I)
18. Thought / D. Concepts / 4. Structure of Concepts / b. Analysis of concepts
The definition of a concept is just its experimental implications [Peirce]
     Full Idea: If one can define accurately all the conceivable experimental phenomena which the affirmation or denial of a concept could imply, one will have therein a complete definition of the concept, and there is absolutely nothing more in it.
     From: Charles Sanders Peirce (Essentials of Pragmatism [1905], I)
     A reaction: Strictly, I would have thought you could only affirm or deny a complete proposition, rather than a concept. What should I do with the concept of a 'unicorn'? Note that all theories, such as empiricism or pragmatism, begin with an account of our concepts.
19. Language / A. Nature of Meaning / 1. Meaning
The meaning or purport of a symbol is all the rational conduct it would lead to [Peirce]
     Full Idea: The entire intellectual purport of any symbol consists in the total of all modes of rational conduct which, conditionally upon all the possible different circumstances and desires, would ensue upon the acceptance of the symbol.
     From: Charles Sanders Peirce (Issues of Pragmaticism [1905], EP ii.246), quoted by Danielle Macbeth - Pragmatism and Objective Truth p.169 n1
     A reaction: Macbeth says pragmatism is founded on this theory of meaning, rather than on a theory of truth. I don't see why the causes of a symbol shouldn't be as much a part of its meaning as the consequences are.
19. Language / A. Nature of Meaning / 5. Meaning as Verification
Non-positivist verificationism says only take a hypothesis seriously if it is scientifically based and testable [Ladyman/Ross on Peirce]
     Full Idea: With Peirce, we endorse a non-positivist version of verificationism - no hypothesis should be taken seriously if apparently beyond our capacity to investigate, and serious metaphysics must concern at least two plausible scientific hypotheses.
     From: comment on Charles Sanders Peirce (How to Make our Ideas Clear [1878]) by J Ladyman / D Ross - Every Thing Must Go 1.3
     A reaction: [compressed] They say this is NOT a theory about meaning, as 'The Big Bang was caused by Elvis' is perfectly meaningful. Verificationism always seems to rule out bold speculation. Don't say 'take string theory seriously', if we can't test it?
19. Language / B. Reference / 1. Reference theories
Icons resemble their subject, an index is a natural sign, and symbols are conventional [Peirce, by Maund]
     Full Idea: For Peirce there are three different kinds of sign, which are different kinds of representation, built on different relationships: an 'icon' represents what it resembles, an 'index' is a natural sign, and a 'symbol' is a conventional sign.
     From: report of Charles Sanders Peirce (Logic as Semiotic: Theory of Signs [1897]) by Barry Maund - Perception Ch.4
     A reaction: Maund makes use of natural signs (like footprints) to explain representative perception. Peirce's distinctions seem useful in philosophy of mind generally, if the brain somehow represents what it experiences. How subjective are signs?
19. Language / C. Assigning Meanings / 9. Indexical Semantics
Indexicals are unusual words, because they stimulate the hearer to look around [Peirce]
     Full Idea: Words like 'this', 'that', 'I', 'you', enable us to convey meanings which words alone are incompetent to express; they stimulate the hearer to look about him.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], II)
     A reaction: Peirce was once of the first to notice the interest of indexicals, and this is a very nice comment on them. A word like 'Look!' isn't like the normal flow of verbiage, and may be the key to indexicals.
20. Action / B. Preliminaries of Action / 2. Willed Action / a. Will to Act
Claiming that actions depend on the will is meaningless; no one knows what the will is [Spinoza]
     Full Idea: Saying that human actions depend on the will is a mere phrase without any idea to correspond to. What the will is, and how it moves the body, no one knows.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 35)
     A reaction: As so often, the rationalist Spinoza agrees with many empiricists about this one. If there is no such thing as the will, then there isn't much prospect of it being free, thought one might talk about 'freedom of thought' instead.
Spinoza argues that in reality the will and the intellect are 'one and the same' [Spinoza, by Cottingham]
     Full Idea: Spinoza argues that in reality the will and the intellect are 'one and the same'.
     From: report of Baruch de Spinoza (The Ethics [1675]) by John Cottingham - The Rationalists p.159
     A reaction: The 'will' is certainly a dubious concept, though it seems involved with desire and actual. In a sense, I suppose, all pursuits of reason are acts of will.
20. Action / C. Motives for Action / 1. Acting on Desires
Whenever we act, then desire is our very essence [Spinoza]
     Full Idea: Desire is man's very essence, insofar as it is agreed to be determined, from any affection of it, to do something. ...Desire is appetite, together with the consciousness of it.
     From: Baruch de Spinoza (The Ethics [1675], III Def of Aff I)
     A reaction: [I think that is the gist of it!] This sounds a bit circular, but seems to say that actions are almost entireoy the expression of desires.
20. Action / C. Motives for Action / 4. Responsibility for Actions
We love or hate people more strongly because we think they are free [Spinoza]
     Full Idea: Because men consider themselves to be free, they have a greater love or hate toward one another than toward other things.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 49S)
     A reaction: A very penetrating remark. If we abandon the concept of free will, I suspect that we will all become much more easy-going and tolerant, but the thought that feelings of love might also decline is a sobering one.
We are the source of an action if only our nature can explain the action [Spinoza]
     Full Idea: I say that we act when anything is done, either within us or without us, of which we are the adequate cause, that is to say, when from our nature anything follows which by that nature alone can be clearly and distinctly understood.
     From: Baruch de Spinoza (The Ethics [1675], III Def 2)
     A reaction: I like that one a lot. The point is to get a concept of responsibility that doesn't need free will, and to distinguish the thief from the kleptomaniac. Does kleptomania derive from a person's true nature? Essentialism in action.
We act when it follows from our nature, and is understood in that way [Spinoza]
     Full Idea: We act when something in us or outside us follows from our nature, which can be clearly and distinctly understood through this alone.
     From: Baruch de Spinoza (The Ethics [1675], III Def2)
     A reaction: I like this, because it links actions to our essential natures, and because it focuses on understanding the action, which must involve explaining the action. This is the root of responsibility, not something called 'free will'. BUT SEE 17202.
21. Aesthetics / A. Aesthetic Experience / 5. Natural Beauty
The most beautiful hand seen through the microscope will appear horrible [Spinoza]
     Full Idea: The most beautiful hand seen through the microscope will appear horrible.
     From: Baruch de Spinoza (Letters to Hugo Boxel [1674], 1674?)
     A reaction: Spinoza offers this nicely expressed point to support his view that beauty is strictly relative to observers, but I am unconvinced. If the outline of the hand is its key aesthetic feature, the viewer through the microscope cannot see it.
22. Metaethics / A. Ethics Foundations / 1. Nature of Ethics / b. Defining ethics
Ethics is the science of aims [Peirce]
     Full Idea: Ethics is the science of aims.
     From: Charles Sanders Peirce (The Nature of Mathematics [1898], II)
     A reaction: Intriguing slogan. He is discussing the aims of logic. I think what he means is that ethics is the science of value. 'Science' may be optimistic, but I would sort of agree with his basic idea.
22. Metaethics / A. Ethics Foundations / 1. Nature of Ethics / f. Ethical non-cognitivism
Whether nature is beautiful or orderly is entirely in relation to human imagination [Spinoza]
     Full Idea: I do not attribute to nature either beauty or deformity, order or confusion. Only in relation to our imagination can things be called beautiful or deformed, ordered or confused.
     From: Baruch de Spinoza (Letters to Oldenburg [1665], 1665?)
     A reaction: This is clearly a statement of Hume's famous later opinion that there are no values ('ought') in nature ('is'). It is a rejection of Aristotelian and Greek teleology. It is hard to argue with, but I have strong sales resistance, rooted in virtue theory.
22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / b. Rational ethics
Men only agree in nature if they are guided by reason [Spinoza]
     Full Idea: Only insofar as men live according to the guidance of reason, must they always agree in nature.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 35)
     A reaction: A nice expression of the guiding idea of the Enlightenment - that consensus is the defining characteristic of rationality. Spinoza's politics emerges from this idea.
We seek our own advantage, and virtue is doing this rationally [Spinoza]
     Full Idea: Acting absolutely from virtue is nothing else in us but acting, living, and preserving our being (these three signify the same thing) by the guidance of reason, from the foundation of seeking one's own advantage.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 24)
     A reaction: The influence of stoicism is obvious here, that we live according to our nature, but our nature is rational. Spinoza doesn't seem to understand the pure altruism of lovers and parents.
22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / e. Human nature
The essence of man is modifications of the nature of God [Spinoza]
     Full Idea: The essence of man consists of certain modifications of the attributes of God.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 10)
     A reaction: Not an idea you hear much these days!
By 'good' I mean what brings us ever closer to our model of human nature [Spinoza]
     Full Idea: By 'good' I understand everything which we are certain is a means by which we may approach nearer and nearer to the model of human nature we set before us.
     From: Baruch de Spinoza (The Ethics [1675], IV Pref)
     A reaction: Unusual, and I'm not sure I understand it. His ideal largely concerns the intellect ruling the emotion
Along with his pantheism, Spinoza equates ethics with the study of human nature [Spinoza, by MacIntyre]
     Full Idea: The counterpart of understanding God as identical with Nature is understanding ethics as the study not of divine precepts but of our own nature and of what necessarily moves us.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Alasdair MacIntyre - A Short History of Ethics Ch.10
     A reaction: As stated here, this seems wrong. We should approach ethics through Aristotle, but not through Freud. That is, virtues can be inferred from human nature, but the actual facts of human nature may be grubby and unpalatable.
If infancy in humans was very rare, we would consider it a pitiful natural defect [Spinoza]
     Full Idea: If a number of human beings were born adult, and only a few here and there were born infants, everyone would pity the infants, because we should then consider infancy not as a thing natural and necessary, but as a defect or fault of nature.
     From: Baruch de Spinoza (The Ethics [1675], V Pr 06)
     A reaction: A lovely example of the new objectivity about human beings that emerged in the Enlightenment. He could have said the same about old age.
22. Metaethics / B. Value / 1. Nature of Value / d. Subjective value
We don't want things because they are good; we judge things to be good because we want them [Spinoza]
     Full Idea: In no case do we strive for, wish for, long for, or desire anything, because we deem it to be good, but on the other hand we deem a thing to be good, because we strive for it, wish for it, long for it, or desire it.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 09)
     A reaction: Shocking, coming from a leading rationalist philosopher. It sounds more like Hume. Surely rationalism should put our capacity for judgement centre-stage? But Spinoza was a determinist. Is Kantian freedom of judgement required? Deterministic judgement?
22. Metaethics / B. Value / 2. Values / e. Death
Is there any such thing as death among the lower organisms? [Peirce]
     Full Idea: Among some of the lower organisms, it is a moot point with biologists whether there be anything which ought to be called death.
     From: Charles Sanders Peirce (The Doctrine of Necessity Examined [1892], p.334)
     A reaction: The point, presumably, is that one phase of an organisms moves into another, and the 'individuals' are not distinct enough for their 'death' to be a significant transition. A nicely mind-expanding thought.
22. Metaethics / B. Value / 2. Values / g. Love
Love is joy with an external cause [Spinoza]
     Full Idea: Love is joy with the accompanying idea of an external cause
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 44)
     A reaction: This doesn't seem to quite capture the pain that some people find in love.
Love is nothing else but pleasure accompanied by the idea of an external cause [Spinoza]
     Full Idea: Love is nothing else but pleasure accompanied by the idea of an external cause.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 13)
     A reaction: Not a definition to give us inspirational guidance! Sounds like grumpy old Hobbes. This is the 'love' of a heroin addict for a syringe. Personally I see love as having a rational aspect, which puts it 'under the aspect of eternity' (as Spinoza said!).
22. Metaethics / B. Value / 2. Values / i. Self-interest
Spinoza names self-interest as the sole source of value [Spinoza, by Stewart,M]
     Full Idea: Spinoza names self-interest as the sole source of value.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Matthew Stewart - The Courtier and the Heretic Ch.10
     A reaction: This looks like a very seventeenth century view. There was a steady move from cynicism through to the optimism of the eighteenth century. I just don't agree that self-interest is the "sole" source of value, though we should never underestimate it.
22. Metaethics / B. Value / 2. Values / j. Evil
If our ideas were wholly adequate, we would have no concept of evil [Spinoza]
     Full Idea: If the human mind had none but adequate ideas, it would form no notion of evil.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 64)
     A reaction: There is some sort of notion of the wholly rational and benign community here, where living well is the single communal thought. It's sort of true. Good people don't even think about wickedness.
22. Metaethics / C. The Good / 1. Goodness / f. Good as pleasure
Music is good for a melancholic, bad for a mourner, and indifferent to the deaf [Spinoza]
     Full Idea: One and the same thing can, at the same time, be good and bad, and also indifferent. For example, music is good for one who is melancholy, bad for one who is mourning, and neither good nor bad to one who is deaf.
     From: Baruch de Spinoza (The Ethics [1675], IV Pref)
     A reaction: This sounds neat and obvious, but both the mourner and the deaf person might well acknowledge that music is a good thing, while failing to appreciate it at the time. I accept that a concert was good, even if I didn't attend it.
22. Metaethics / C. The Good / 2. Happiness / d. Routes to happiness
Man's highest happiness consists of perfecting his understanding, or reason [Spinoza]
     Full Idea: In life it is before all things useful to perfect the understanding, or reason, as far as we can, and in this alone man's highest happiness or blessedness consists.
     From: Baruch de Spinoza (The Ethics [1675], IVApp 04)
     A reaction: I fear that only a highly intelligent person like Spinoza would suggest this. The genius of Jesus is to say that if you don't have a powerful intellect you can still be happy by having a pure and loving heart. The Spinoza route is better, if possible.
22. Metaethics / C. The Good / 3. Pleasure / a. Nature of pleasure
Pleasure is a passive state in which the mind increases in perfection [Spinoza]
     Full Idea: By pleasure I shall signify a passive state wherein the mind passes to a greater perfection.
     From: Baruch de Spinoza (The Ethics [1675], III Pr 11)
     A reaction: A rather bizarre definition! He seems to be defining it as a state and as a process in the same sentence. It sounds to me like both a hedonist's charter, and nonsense. I'm with Plato and Aristotle, that pleasure is dangerous as it warps the mind.
22. Metaethics / C. The Good / 3. Pleasure / f. Dangers of pleasure
Pleasure is only bad in so far as it hinders a man's capability for action [Spinoza]
     Full Idea: Pleasure is only bad in so far as it hinders a man's capability for action.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 59)
     A reaction: This seems to be the incipient epicureanism found in enlightenment figures who are drifting towards atheism (of which his contemporaries accused Spinoza). Sadism? Grief is good pain. I'm too happy to be cruel.
23. Ethics / A. Egoism / 1. Ethical Egoism
Reason demands nothing contrary to nature, and so it demands self-love [Spinoza]
     Full Idea: As reason makes no demands contrary to nature, it demands that every man should love himself, should seek that which is useful to him.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 18)
     A reaction: Maybe nature seems to demand self-love, but I don't see why reason should demand it, only why reason should not deny it. There is no point in denying something unavoidable. However, if we don't love ourselves, no one else is likely to.
Self-satisfaction is the highest thing for which we can hope [Spinoza]
     Full Idea: Self-satisfaction is the highest thing for which we can hope, for no one endeavours to preserve his being for the same of any end. [Pr 53: Humility is not a virtue]
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 52)
     A reaction: You can sense here that Spinoza was not a family man.
23. Ethics / B. Contract Ethics / 1. Contractarianism
Both virtue and happiness are based on the preservation of one's own being [Spinoza]
     Full Idea: The foundation of virtue is the endeavour to preserve one's own being, and happiness consists in man's power of preserving his own being.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 18)
     A reaction: Spinoza never actually says so, but this seems to me to point to a Hobbesian social contract account of virtue - that is, that virtue is not an ideal, but a strategy. Personally I prefer the Aristotelian view, that it is an ideal revealed to us by nature.
23. Ethics / C. Virtue Theory / 1. Virtue Theory / b. Basis of virtue
To act virtuously is to act rationally [Spinoza]
     Full Idea: To act in conformity to virtue is to act according to the guidance of reason.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 36)
     A reaction: This Kantian ideal always seems to be missing foundational values or feelings. If something is judged to be rubbish, I throw it away.
The more we strive for our own advantage, the more virtuous we are [Spinoza]
     Full Idea: The more each one strives, and is able, to seek his own advantage, that is, to preserve his being, the more he is endowed with virtue.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 20)
     A reaction: Beth Lord says this is his key ethical idea. Our conatus (striving) is the essence of our nature, and virtue is the perfect expression of our essence. Presumably the destruction of others in competition is also bad for us.
All virtue is founded on self-preservation [Spinoza]
     Full Idea: The endeavour after self-preservation is the primary and only foundation of virtue.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 22)
     A reaction: This fits in perfectly with modern evolutionary ethics.
23. Ethics / C. Virtue Theory / 2. Elements of Virtue Theory / b. Living naturally
To live according to reason is to live according to the laws of human nature [Spinoza]
     Full Idea: Man acts absolutely according to the laws of his nature, when he lives in obedience to reason.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 35)
     A reaction: This is pure stoicism, and shows that Spinoza is in many ways the culmination of the seventeenth century stoic revival (e.g. in the art of Poussin). I love the idea that right reason and nature are in perfect harmony. I wonder why?
23. Ethics / C. Virtue Theory / 2. Elements of Virtue Theory / j. Unity of virtue
A man ignorant of himself is ignorant of all of the virtues [Spinoza]
     Full Idea: The man who is ignorant of himself is ignorant of the foundation of all the virtues, and consequently is ignorant of all the virtues.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 56)
     A reaction: This would appeal to Aristotle, for whom the social virtues are an aspect of one's own character, and not a calculation made about externals.
23. Ethics / C. Virtue Theory / 3. Virtues / d. Courage
In a free man, choosing flight can show as much strength of mind as fighting [Spinoza]
     Full Idea: Flight at the proper time, just as well as fighting, is to be reckoned as showing strength of mind in a man who is free; that is to say, a free man chooses flight by the same strength or presence of mind as that by which he chooses battle.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 69)
     A reaction: I wonder why showing 'strength of mind' is a virtue?
23. Ethics / C. Virtue Theory / 3. Virtues / f. Compassion
A person unmoved by either reason or pity to help others is rightly called 'inhuman' [Spinoza]
     Full Idea: He who is moved neither by reason nor pity to be of any service to others is properly called inhuman; for he seems to be unlike a man.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 50)
     A reaction: Calling someone 'inhuman' doesn't seem like much of a condemnation. Nietzschean aristocrats may take pride in being above the mere 'human'. We gather here that if reason failed to motivate helping others, then pity would be a good thing.
Pity is a bad and useless thing, as it is a pain, and rational people perform good deeds without it [Spinoza]
     Full Idea: Pity is a pain, and is therefore in itself bad; only at the dictation of reason are we able to perform any action, which we know for certain to be good; thus, in a man who lives under the guidance of reason, pity in itself is useless and bad.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 50)
     A reaction: This is the essence of both Kant's and Bentham's views. It is, however, unclear why a wholly rational and unfeeling person should be motivated to prevent other people's pain. It also don't think it follows that because it is painful it is bad.
Pity is not a virtue, but at least it shows a desire to live uprightly [Spinoza]
     Full Idea: Pity, like shame, although it is not a virtue, is nevertheless good, in so far as it shows that a desire of living uprightly is present in the man who is possessed with shame.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 58)
     A reaction: And yet, in so far as I am rational, it seems that I should endeavour to suppress pity and replace it with right reason. Does Spinoza feel loyalty to the human race, I wonder?
People who live according to reason should avoid pity [Spinoza]
     Full Idea: A man who lives according to the dictates of reason endeavours as much as possible to prevent himself from being touched by pity.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 50)
     A reaction: Since pity seems to give rise to some thoroughly good actions, I am not quite clear how reason would give rise to those same actions unaided. The alleviation of another's pain seems to have no pure motivation, if there is no empathy.
23. Ethics / C. Virtue Theory / 4. External Goods / c. Wealth
Rational people judge money by needs, and live contented with very little [Spinoza]
     Full Idea: Those who know the true use of money, and regulate the measure of wealth according to their needs, live contented with few things.
     From: Baruch de Spinoza (The Ethics [1675], IVApp 29)
     A reaction: Spinoza himself lived up to this, being incredibly austere in his personal life.
23. Ethics / D. Deontological Ethics / 2. Duty
People should follow what lies before them, and is within their power [Peirce]
     Full Idea: Each person ought to select some definite duty that clearly lies before him and is well within his power as the special task of his life.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
     A reaction: I like that. Note especially that it should be 'well' within his power. Note also that this is a 'duty', and not just a friendly suggestion. Not sure what the basis of the duty is.
23. Ethics / D. Deontological Ethics / 3. Universalisability
Rational people are self-interested, but also desire the same goods for other people [Spinoza]
     Full Idea: Men who are governed by reason - that is, who seek what is useful to them in accordance with reason - desire for themselves nothing, which they do not also desire for the rest of mankind, and so are just, faithful and honourable in their conduct.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 18)
     A reaction: This is pulling a rather Kantian rabbit out of a very social contract hat. It chimes in with Aristotle's account of self-interest, which leads to good civic virtues. True Kantianism is self-abnegating, but Spinoza lets selfishness take the lead.
A rational person will want others to have the goods he seeks for himself [Spinoza]
     Full Idea: He who lives under the guidance of reason, desires for others the good which he seeks for himself.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 51)
     A reaction: Obviously a very Kantian idea. It implies that all rational people desire similar goods, but it is rational to collect stamps but not want other people to do so as well. I don't think you should want what I want for Christmas.
24. Political Theory / A. Basis of a State / 1. A People / a. Human distinctiveness
If people are obedient to reason, they will live in harmony [Spinoza]
     Full Idea: Men insofar as they live in obedience to reason, necessarily live always in harmony with one another.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 35)
     A reaction: A beautiful slogan for a belief which has gripped me since I was a child. It embodies the frustration of philosophers from Plato onwards, and it may well be childishly idealistic. Politics is the art of the possible, said R.A.B. Butler.
24. Political Theory / A. Basis of a State / 1. A People / c. A unified people
Peoples are created by individuals, not by nature, and only distinguished by language and law [Spinoza]
     Full Idea: Nature certainly does not create peoples, individuals do, and individuals are only separated into nations by differences of language, law and morality.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 17.26)
     A reaction: Quite wrong, I think. How did languages evolve if there were not already distinct peoples? Do ants and bees only form into colonies by individual choice? All social contract theories seem to make Spinoza's assumption.
The ideal for human preservation is unanimity among people [Spinoza]
     Full Idea: Man can wish for nothing more helpful to the preservation of his being than that all should so agree in all things that the minds and bodies of all would compose, as it were, one mind and one body.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 18S)
     A reaction: There has never been a more glorious vision of a unified people than this, which epitomises Enlightenment optimism. It may be a little on the optimistic side. We might at least hope that rational education encourages the convergence.
24. Political Theory / A. Basis of a State / 3. Natural Values / a. Natural freedom
Only self-knowledge can liberate us [Spinoza, by MacIntyre]
     Full Idea: In Spinoza, self-knowledge, and only self-knowledge, liberates.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Alasdair MacIntyre - A Short History of Ethics Ch.10
     A reaction: Spinoza was a determinist, as far as ultimate inner freedom is concerned. The massive continental philosophers' effort of phenomenology and deconstruction seems to be premissed on this idea. Freedom seems to be their highest value.
24. Political Theory / A. Basis of a State / 3. Natural Values / c. Natural rights
In nature everything has an absolute right to do anything it is capable of doing [Spinoza]
     Full Idea: Since the universal power of nature is only the power of all individual things together, it follows that each individual thing has the sovereign right to do everything it can do, or the right of each thing extends as far as its determined power extends.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.01)
     A reaction: A typically ruthless Spinoza idea, very different from the rather ill-founded claims of Locke and Rousseau about the state of nature.
Natural rights are determined by desire and power, not by reason [Spinoza]
     Full Idea: Each person's natural right is determined not by sound reason but by desire and power. For it is not the case that all men are naturally determined to behave according to the rules and laws of reason
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.03)
     A reaction: Locke would have been horrified by this. It looks like hopeless unfounded optimism to claim a natural right to anything. Doomed prey can struggle all it likes, but its right to do so seems irrelevant. Yet we see self-evident injustice all the time.
Spinoza extended Hobbes's natural rights to cover all possible desires and actions [Spinoza, by Tuck]
     Full Idea: It was Spinoza who extended the idea of natural rights to cover all possible desires and actions, and he did so knowing that he was transforming Hobbes's theory.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Richard Tuck - Hobbes Ch.2
     A reaction: Hobbes had stuck to self-preservation. His problem was how to draw a line, saying that was a natural right, but there wasn't a natural right to a good bottle of claret. Spinoza's drastic solutions suggests that the whole approach is wrong.
24. Political Theory / B. Nature of a State / 1. Purpose of a State
Society exists to extend human awareness [Spinoza, by Watson]
     Full Idea: For Spinoza the purpose of society was the extension of human awareness.
     From: report of Baruch de Spinoza (Tractatus Theologico-Politicus [1670]) by Peter Watson - Ideas Ch.24
     A reaction: I like that. Personally I think human understanding is the best aim our lives can have, but I am inclined to see this in rather individualistic terms (despairing of getting others interested in the project!).
The state aims to allow personal development, so its main purpose is freedom [Spinoza]
     Full Idea: It is the purpose of the state ...to allow people's minds and bodies to develop in their own way in security and enjoy the free use of reason ...Therefore the true purpose of the state is in fact freedom.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 20.06)
     A reaction: The core of Spinoza's political thinking. This strikes me as being as close to communitarianism as to liberalism.
24. Political Theory / B. Nature of a State / 2. State Legitimacy / a. Sovereignty
Sovereignty must include the power to make people submit to it [Spinoza]
     Full Idea: Either there is no sovereignty nor any right over subjects, or else sovereignty must necessarily extend to everything that might be effective in inducing men to submit to it.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 17.02)
     A reaction: In the seventeenth century this usually includes the death penalty. Refusal to submit may be fairly passive and harmless, so the issue must concern duties, rather than rights. Taxes, jury duty, calls to arms.
24. Political Theory / C. Ruling a State / 2. Leaders / b. Monarchy
Kings tend to fight wars for glory, rather than for peace and liberty [Spinoza]
     Full Idea: As soon as the kings took control [of the Hebrews] the reason for going to war was no longer peace and liberty but rather glory,
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 18.05)
     A reaction: As Spinoza was writing, Louis XIV had just invaded Holland, solely in quest of military glory. As soon as a leader like Napoleon discovers they are good at war, I assume that the thrill of glory takes over for them too.
Monarchs are always proud, and can't back down [Spinoza]
     Full Idea: Monarchical minds are always proud, and cannot back down without feelings of humiliation.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 18.05)
     A reaction: This would seem to be a problem in all politicians. As I teacher I found that backing down was sometimes quite a smart move, but you can only do it occasionally.
Deposing a monarch is dangerous, because the people are used to royal authority [Spinoza]
     Full Idea: It is dangerous to depose a monarch, even if it is clear by every criterion that he is a tyrant. A people accustomed to royal authority and held in check only by it, will despise any lesser authority and hold it in contempt.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 18.07)
     A reaction: He is obviously thinking of Charles I and Cromwell. I suspect that the respect for Cromwell in the 1650s was only as a great soldier. If the people miss royal authority, the correct response is probably 'get over it!'
24. Political Theory / C. Ruling a State / 4. Changing the State / c. Revolution
Every state is more frightened of its own citizens than of external enemies [Spinoza]
     Full Idea: People have never succeeded in devising a form of government that was not in greater danger from its own citizens than from foreign foes, and which was not more fearful of the former than of the latter.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 17.04)
     A reaction: The sort of lovely clear-headed and accurate observation for which we love Spinoza. Only very powerful despots can afford to ignore the threat from the people. Stalin was paranoid, but eventually murdered almost everyone who seemed a threat.
24. Political Theory / D. Ideologies / 5. Democracy / c. Direct democracy
Democracy is a legitimate gathering of people who do whatever they can do [Spinoza]
     Full Idea: Democracy is properly defined as a united gathering of people which collectively has the sovereign right to do all that it has the power to do.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.08)
     A reaction: Representative democracy doesn't fit this definition. What 'unites' the people, and where do they get their sovereign right? If my neighbouring village votes to invade mine, I spurn their pathetic 'sovereign right'.
24. Political Theory / D. Ideologies / 10. Theocracy
If religion is law, then piety is justice, impiety is crime, and non-believers must leave [Spinoza]
     Full Idea: [In the first Hebrew state] religious dogmas were not doctrines but rather laws and decrees, piety being regarded as justice and impiety as crime. Anyone who defected from this religion ceased to be a citizen.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 17.08)
     A reaction: Presumably speeding offences count as impiety, and failing to pray is a crime. A critical question will be how far religious doubts must extend before one actually has to leave. Mere doctrinal differences, or full atheism?
Allowing religious ministers any control of the state is bad for both parties [Spinoza]
     Full Idea: How pernicious it is both for religion and the state to allow ministers of things sacred to acquire the right to make decrees or handle the business of government.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 18.06 (1))
     A reaction: Interesting that he holds it to be bad for the religion as well as the state. In Britain we have bishops in the House of Lords.
25. Social Practice / A. Freedoms / 1. Slavery
Slavery is a disgraceful crime [Spinoza]
     Full Idea: Slavery is a disgraceful crime.
     From: Baruch de Spinoza (The Ethics [1675], IVApp 21)
     A reaction: Note the date of this - when the slave trade is just getting going, and long before it is threatened or criticised.
Slavery is not just obedience, but acting only in the interests of the master [Spinoza]
     Full Idea: It is not acting on command in itself that makes someone a slave, but rather the reason for so acting. ...A slave is someone obliged to obey commands from a master which look only to the advantage of the master.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.10)
     A reaction: So if I forcibly enslaved you, and then only commanded things which were for your own good, that would not be slavery? If the master feeds the slave, is that not part of the slavery? Most jobs might count as slavery by this account?
25. Social Practice / A. Freedoms / 2. Freedom of belief
Government is oppressive if opinions can be crimes, because people can't give them up [Spinoza]
     Full Idea: Government is bound to become extremely oppressive where dissident opinions which are within the domain of each individual, a right which no one can give up, are treated as a crime.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 18.06 (2))
     A reaction: One might compare illicit desires, such as those of a paedophile, where it is a crime to act on them, but presumably they cannot be given up, so there is no point in legislating against the mere desires.
Without liberty of thought there is no trust in the state, and corruption follows [Spinoza]
     Full Idea: If liberty of thought is suppressed ...this would undemine the trust which is the first essential of a state; detestable flattery and deceit would flourish, giving rise to intrigues and every sort of honest behaviour.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 20.11)
     A reaction: Spinoza specifically defends philosophy, as the epitome of freedom of thought.
25. Social Practice / A. Freedoms / 3. Free speech
Treason may be committed as much by words as by deeds [Spinoza]
     Full Idea: We cannot altogether deny that treason may be committed as much by words as by deeds.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 20.05)
     A reaction: For example, betraying a major state secret. This is an important idea, for anyone who simplistically demands utter freedom of speech. There is also subversive speech, which is very hard to assess. Incitements can be crimes in Britain.
25. Social Practice / A. Freedoms / 6. Political freedom
The freest state is a rational one, where people can submit themselves to reason [Spinoza]
     Full Idea: The freest state is that whose laws are founded on sound reason; for there each man can be free whenever he wishes, that is, he can live under the guidance of reason with his whole mind.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.10)
     A reaction: I wonder if is not so much that the state is rational as that it is right. Freedom is submission to the truth. Rationality is only good because it arrives at truth. But is there a 'truth' about how a state should be run? Enlightenment optimism.
25. Social Practice / C. Rights / 1. Basis of Rights
Spinoza wanted democracy based on individual rights, and is thus the first modern political philosopher [Stewart,M on Spinoza]
     Full Idea: Spinoza's advocacy of democracy on the basis of individual rights was extraordinarily bold for its time, and it qualifies him as the first truly modern political philosopher.
     From: comment on Baruch de Spinoza (Tractatus Theologico-Politicus [1670]) by Matthew Stewart - The Courtier and the Heretic Ch. 6
     A reaction: Sounds right. Hobbes may have been the 'first modern man', but his politics was fairly medieval. John Lilburne and co. may have campaigned for rights and democracy, but they weren't really philosophers.
The sovereignty has absolute power over citizens [Spinoza]
     Full Idea: No offence can be committed against subjects by sovereigns, since they are of right permitted to do all things., and therefore offences occur only between private persons obliged by law not to harm one another.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.14)
     A reaction: This slightly alarming remark is the consequence of Spinoza's denial of natural rights. Nowadays we have international law to appeal to. Locke thinks revolution could be justified, but this implies the Spinoza does not?
25. Social Practice / C. Rights / 3. Alienating rights
Forming a society meant following reason, and giving up dangerous appetites and mutual harm [Spinoza]
     Full Idea: People had to make a firm decision to decide everything by the sole dictates of reason (which no one dares contradict openly). They had to curb their appetites if it would hurt someone else, and not do to others what they did not want done to themselves.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.05)
     A reaction: The last bit invokes the Golden Rule. Being in society does indeed meaning curbing appetites, such as envy and lust.
People only give up their rights, and keep promises, if they hope for some greater good [Spinoza]
     Full Idea: No one will give up his right to all things, and absolutely no one will keep his promises, except from fear of a greater ill or hope of a greater good.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.06)
     A reaction: I think Locke and Rousseau would agree with this. It is hard to imagine doing anything other than in hope of a greater good. But what to do when your hopes are disappointed?
Once you have given up your rights, there is no going back [Spinoza]
     Full Idea: If people had wanted to keep any right for themselves, they should have made this provision at the same time as they could have safely defended it.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.08)
     A reaction: Spinoza is wonderful for grasping nettles. The other fans of social contracts seem blithely cheerful about how it is going to work out. But forming a society is like marriage - a risky commitment which could go horribly wrong.
In democracy we don't abandon our rights, but transfer them to the majority of us [Spinoza]
     Full Idea: In a democracy no one transfers their natural right to another in such a way that they are not thereafter consulted, but rather to the majority of the whole society of which they are part.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.11)
     A reaction: At this time democracy means Athenian direct democracy. In representative democracy you are only consulted once every few years, and in between the government can ignore the people (as Rousseau pointed out).
No one, in giving up their power and right, ceases to be a human being [Spinoza]
     Full Idea: No one will ever be able to transfer his power and (consequently) his right to another person in such a way that he ceases to be a human being.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 17.01)
     A reaction: Spinoza disdains natural rights, but this is a modest (and pretty uncontroversial) concession.
Everyone who gives up their rights must fear the recipients of them [Spinoza]
     Full Idea: People have never given up their right and transferred their power to another in such a way that they did not fear the very persons who received their right and power, and put the government at greater risk from its own citizens than from its enemies.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 17.01)
     A reaction: I take this idea to be Rousseau's key motivation for the idea of the general will, because you are there supposed to be alienating your natural rights to yourself (sort of). In a democracy you alienate them partly to yourself.
The early Hebrews, following Moses, gave up their rights to God alone [Spinoza]
     Full Idea: The Hebrews being in this natural state, they resolved, on the advice of Moses in whom they all had the greatest trust, to transfer their right to no mortal man but rather to God alone.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 17.07)
     A reaction: [He cites Exodus 24:7] He calls this the first Hebrew state, which seems to have depended heavily on Moses. Priests and prophets become crucial in this situation, and they may be in conflict about God's commands.
25. Social Practice / D. Justice / 2. The Law / c. Natural law
The order of nature does not prohibit anything, and allows whatever appetite produces [Spinoza]
     Full Idea: The order of nature, under which all human beings are born and for the most part live, prohibits nothing but what no one desires or no one can do; it does not prohibit strife or hatred or anger or anything at all that appetite foments.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.04)
     A reaction: This is as vigorous a rejection of natural law as I have met with. It is hard to see on what grounds anyone could disagree, other than hopeful sentiment.
25. Social Practice / E. Policies / 2. Religion in Society
State and religious law can clash, so the state must make decisions about religion [Spinoza]
     Full Idea: No one would be obliged by law if he considered it against his faith, and everyone could claim licence to do anything. Since the law of the state would then be wholly violated, it follows that the right of deciding about religion belongs to the sovereign.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 16.21)
     A reaction: This is an era when British puritans emigrate to America, because the state is not sufficiently tolerant. The needs of sovereignty and of religion can be very far apart. You can see those with great religious devotion not liking this idea.
25. Social Practice / E. Policies / 5. Education / b. Education principles
We are not inspired by other people's knowledge; a sense of our ignorance motivates study [Peirce]
     Full Idea: It is not the man who thinks he knows it all, that can bring other men to feel their need for learning, and it is only a deep sense that one is miserably ignorant that can spur one on in the toilsome path of learning.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], IV)
25. Social Practice / E. Policies / 5. Education / c. Teaching
The best use of talent is to teach other people to live rationally [Spinoza]
     Full Idea: There is nothing by which a person can better show how much skill and talent he possesses than by so educating men that at last they will live under the direct authority of reason.
     From: Baruch de Spinoza (The Ethics [1675], IVApp 09)
     A reaction: Speaking as a retired philosophy teacher, I think this is an excellent idea, but then I would, wouldn't I? What if you turn a nice warm-hearted friendly young person into a chillingly detached heartless reasoner?
25. Social Practice / F. Life Issues / 4. Suicide
It is impossible that the necessity of a person's nature should produce a desire for non-existence [Spinoza]
     Full Idea: That a man, from the necessity of his own nature, should endeavour to become non-existent, is as impossible as that something should be made out of nothing.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 20)
     A reaction: At first glance this is very paradoxical, but it fits with evolutionary theory, which seems to make it almost inconceivable to naturally desire suicide. The desire to live is universal, and only circumstances can create an artifiical contradictory desire.
25. Social Practice / F. Life Issues / 6. Animal Rights
Animals feel, but that doesn't mean we can't use them for our pleasure and profit [Spinoza]
     Full Idea: I by no means deny that brutes feel, but I do deny that on this account it is unlawful for us to consult our own profit by using them for our own pleasure and treating them as is most convenient for us, inasmuch as they do not agree in nature with us.
     From: Baruch de Spinoza (The Ethics [1675], IV Pr 37)
     A reaction: Something a bit chilling about this. What if I decided that some people did 'not agree with my nature'? Presumably pleasure includes hunting? What was his attitude to bear-baiting?
26. Natural Theory / A. Speculations on Nature / 1. Nature
We can easily think of nature as one individual [Spinoza]
     Full Idea: We may easily conceive the whole of nature to be one individual.
     From: Baruch de Spinoza (The Ethics [1675], II Lem 7)
26. Natural Theory / A. Speculations on Nature / 2. Natural Purpose / b. Limited purposes
Nature has no particular goal in view, and final causes are mere human figments [Spinoza]
     Full Idea: Nature has no particular goal in view, and final causes are mere human figments.
     From: Baruch de Spinoza (The Ethics [1675], IApp)
     A reaction: This is Spinoza's famous rejection of Aristotelian teleology, which was the last seventeenth century nail in the coffin of the great man. Spinoza substitutes God, but loss of faith in that concept then left us with no purpose at all, as in Hume.
26. Natural Theory / A. Speculations on Nature / 2. Natural Purpose / c. Purpose denied
Spinoza strongly attacked teleology, which is the lifeblood of classical logos [Roochnik on Spinoza]
     Full Idea: In his 'Ethics' Spinoza shows his enormous hostility to teleology, which is the lifeblood of classical logos.
     From: comment on Baruch de Spinoza (The Ethics [1675]) by David Roochnik - The Tragedy of Reason p.77
For Spinoza eyes don't act for purposes, but follow mechanical necessity [Roochnik on Spinoza]
     Full Idea: Aristotle would be perfectly happy with the idea that the eyes are for the purpose of seeing. Spinoza would disagree. The objects of the world, including parts of living organisms, have purposes, but obey the laws of mechanical necessity.
     From: comment on Baruch de Spinoza (The Ethics [1675]) by David Roochnik - The Tragedy of Reason p.79
     A reaction: My view is that eyes wouldn't exist if they didn't see, which places them in a different category from inorganic matter.
Final causes are figments of human imagination [Spinoza]
     Full Idea: All final causes are nothing but human fictions.
     From: Baruch de Spinoza (The Ethics [1675], IApp)
     A reaction: You can see why Spinoza was rather controversial in the late seventeenth century, when he says things as bold as this, even though he is echoing Descartes. The latter's proposal (Idea 12730) is methodological, whereas this idea is metaphysical.
26. Natural Theory / A. Speculations on Nature / 5. Infinite in Nature
An infinite line can be marked in feet or inches, so one infinity is twelve times the other [Spinoza]
     Full Idea: If an infinite line be measured out in feet, it will consist of an infinite number of such parts; it would equally consist of an infinite number of parts, if each part was only an inch; therefore, one infinity would be twelve times as great as the other.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 15)
     A reaction: This seems to anticipate Cantor. Spinoza's point seemed bewildering then, but is now accepted as a standard feature of the concept of infinity.
26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / c. Ultimate substances
In nature there is just one infinite substance [Spinoza]
     Full Idea: In nature only one substance exists, and it is absolutely infinite.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 10)
     A reaction: This seems to render the concept of 'substance' redundant, since all the interest is now in the attributes (or whatever) of this one substance, and we must work to discount the appearance of there being numerous substances (e.g. you and me).
26. Natural Theory / B. Natural Kinds / 1. Natural Kinds
Chemists rely on a single experiment to establish a fact; repetition is pointless [Peirce]
     Full Idea: The chemist contents himself with a single experiment to establish any qualitative fact, because he knows there is such a uniformity in the behavior of chemical bodies that another experiment would be a mere repetition of the first in every respect.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], IV)
     A reaction: I take it this endorses my 'Upanishads' view of natural kinds - that for each strict natural kind, if you've seen one you've them all. This seems to fit atoms and molecules, but only roughly fits tigers.
26. Natural Theory / B. Natural Kinds / 2. Defining Kinds
What is true of one piece of copper is true of another (unlike brass) [Peirce]
     Full Idea: The guiding principle is that what is true of one piece of copper is true of another; such a guiding principle with regard to copper would be much safer than with regard to many other substances - brass, for example.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p. 8)
     A reaction: Peirce is so beautifully simple and sensible. This gives the essential notion of a natural kind, and is a key notion in our whole understanding of physical reality.
26. Natural Theory / C. Causation / 3. Final causes
A final cause is simply a human desire [Spinoza]
     Full Idea: A cause which is called final is nothing else but human desire, in so far as it is considered as the origin or cause of anything.
     From: Baruch de Spinoza (The Ethics [1675], IV Pref)
     A reaction: A rather vicious swipe at Aristotle! It chimes in with the modern scientific view of the world (mostly associated with Hume), that nature has no intrinsic values or aims. On the large scale, Spinoza is right, but nature can still show us what has value.
26. Natural Theory / C. Causation / 9. General Causation / d. Causal necessity
From a definite cause an effect necessarily follows [Spinoza]
     Full Idea: From a definite cause an effect necessarily follows.
     From: Baruch de Spinoza (The Ethics [1675], I Ax 3)
     A reaction: This encapsulate the view against which Hume was rebelling. However, nowadays no one thinks Spinoza is self-evidently wrong. How are we to distinguish between a cause and a coincident event? We must claim natural necessity.
26. Natural Theory / D. Laws of Nature / 1. Laws of Nature
The world is full of variety, but laws seem to produce uniformity [Peirce]
     Full Idea: Exact law obviously never can produce heterogeneity out of homogeneity; and arbitrary heterogeneity is the feature of the universe the most manifest and characteristic.
     From: Charles Sanders Peirce (The Architecture of Theories [1891], p.319)
     A reaction: This is the view of laws of nature now associated with Nancy Cartwright, but presumably you can explain the apparent chaos in terms of the intersection of vast numbers of 'laws'. Or, better, there aren't any laws.
Our laws of nature may be the result of evolution [Peirce]
     Full Idea: We may suppose that the laws of nature are results of an evolutionary process. ...But this evolution must proceed according to some principle: and this principle will itself be of the nature of a law.
     From: Charles Sanders Peirce (Reasoning and the Logic of Things [1898], VII)
     A reaction: Maybe I've missed something, but this seems a rather startling idea that doesn't figure much in modern discussions of laws of nature. Lee Smolin's account of evolving universes comes to mind.
26. Natural Theory / D. Laws of Nature / 4. Regularities / a. Regularity theory
If the world is just mechanical, its whole specification has no more explanation than mere chance [Peirce]
     Full Idea: The mechanical philosopher leaves the whole specification of the world utterly unaccounted for, which is pretty nearly as bad as to baldly attribute it to chance.
     From: Charles Sanders Peirce (The Doctrine of Necessity Examined [1892], p.337)
     A reaction: If now complete is even remotely available, then that doesn't seem to matter too much, but if there is one message modern physics teaches philosophy, it is that we should not give up on trying to answer the deeper questions.
26. Natural Theory / D. Laws of Nature / 11. Against Laws of Nature
The more precise the observations, the less reliable appear to be the laws of nature [Peirce]
     Full Idea: Try to verify any law of nature, and you will find that the more precise your observations, the more certain they will be to show irregular departures from the law.
     From: Charles Sanders Peirce (The Doctrine of Necessity Examined [1892], p.331)
     A reaction: This nicely encapsulates modern doubts about whether the so-called 'laws' of nature actually capture what is going on in the real world.
27. Natural Reality / G. Biology / 3. Evolution
Natural selection might well fill an animal's mind with pleasing thoughts rather than true ones [Peirce]
     Full Idea: It is probably of more advantage to an animal to have his mind filled with pleasing and encouraging visions, independently of their truth; and thus, upon unpractical subjects, natural selection might occasion a fallacious tendency of thought.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p. 8)
     A reaction: Note that this is a pragmatist saying that a set of beliefs might work fine but be untrue. So Peirce does not have the highly relativistic notion of truth of some later pragmatists. Good for him. Note the early date to be thinking about Darwin.
Darwinian evolution is chance, with the destruction of bad results [Peirce]
     Full Idea: Darwinian evolution is evolution by the operation of chance, and the destruction of bad results.
     From: Charles Sanders Peirce (The Architecture of Theories [1891], p.320)
     A reaction: The 'destruction of bad results' is a much better slogan for Darwin that Spencer's 'survival of the fittest'. It is, of course, a rather unattractive God who makes progress by endlessly destroying huge quantities of failed (but living) experiments.
28. God / A. Divine Nature / 1. God
The key question for Spinoza is: is his God really a God? [Stewart,M on Spinoza]
     Full Idea: The single most important question that can be raised about Spinoza's philosophy is: Is his God really a God?
     From: comment on Baruch de Spinoza (The Ethics [1675]) by Matthew Stewart - The Courtier and the Heretic Ch.13
     A reaction: Novalis called Spinoza a "God-intoxicated man", but this question shows why many of Spinoza's contemporaries (and later) considered him to be an atheist. The general modern answer by commentators to the question appears to be 'No!'.
28. God / A. Divine Nature / 2. Divine Nature
God feels no emotions, of joy or sorrow [Spinoza]
     Full Idea: God is free from passions, neither is He affected with any affect of joy or sorrow.
     From: Baruch de Spinoza (The Ethics [1675], V Pr 17)
     A reaction: The general Christian view is that God has great compassion for human suffering, as Jesus appears to have had. Spinoza was very very intellectual.
Spinoza's God is just power and necessity, without perfection or wisdom [Leibniz on Spinoza]
     Full Idea: The Spinozist view allows God infinite power only, not granting him either perfection or wisdom, and dismisses searches for final causes and explains everything through brute necessity.
     From: comment on Baruch de Spinoza (The Ethics [1675]) by Gottfried Leibniz - New Essays on Human Understanding 73
     A reaction: It takes a genius like Leibniz to explain so clearly what Spinoza was up to. Some call Spinoza 'God-intoxicated', but others say he is an incipient atheist. The latter is probably closer to the truth.
Spinoza's God is not a person [Spinoza, by Jolley]
     Full Idea: Spinoza's God is not a person.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Nicholas Jolley - Leibniz Ch.5
     A reaction: This will be the central reason why Spinoza was so controversial, because such a view instantly makes religion pointless, despite retaining a core of theism.
God is wholly without passions, and strictly speaking does not love anyone [Spinoza, by Cottingham]
     Full Idea: God, asserts Spinoza, is wholly without passions, and strictly speaking does not love anyone.
     From: report of Baruch de Spinoza (The Ethics [1675]) by John Cottingham - The Rationalists p.179
     A reaction: This seems to me a much more plausible conception of God than the anthropomorphic one of him as the perfect parent who dotes on his offspring.
God is the sum and principle of all eternal laws [Spinoza, by Armstrong,K]
     Full Idea: For Spinoza God is simply the principle of law, the sum of all the eternal laws in existence.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Karen Armstrong - A History of God Ch.9
     A reaction: This seems at variance with the usual view, that Spinoza identifies God with the single substance which makes up nature, and that he is hence a pantheist. Compare the above idea with Idea 4829, for example. Spinoza's God seems close to Aristotle's.
God is not loveable for producing without choice and by necessity; God is loveable for his goodness [Leibniz on Spinoza]
     Full Idea: There is nothing loveable in a God who produces without choice and by necessity, without discrimination of good and evil. The true love of God is founded not in necessity but in goodness.
     From: comment on Baruch de Spinoza (The Ethics [1675], IV Pr 28) by Gottfried Leibniz - Comments on Spinoza's Philosophy
     A reaction: This responds to Spinoza's claims about an 'intellectual' love of God. But why do we love people. It is possible that it is always for their goodness, but might we not love a great mathematician, simply for their wonderful mathematics?
God does not act according to the freedom of the will [Spinoza]
     Full Idea: God does not act according to the freedom of the will.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 32)
     A reaction: Personally I am struck by the idea that even if God had 'free will', I can't see how He would be sure of the fact (the unperceived puppetmaster!). However, I have actually come to the conclusion that a fotally 'free' will is an incoherent concept.
God is a substance with infinite attributes [Spinoza]
     Full Idea: By God, I understand Being absolutely infinite, that is to say, substance consisting of infinite attributes, each one of which expresses eternal and infinite essence.
     From: Baruch de Spinoza (The Ethics [1675], I Def 6)
God has no purpose, because God lacks nothing [Spinoza]
     Full Idea: If God works to obtain an end, He necessarily seeks something of which he stands in need.
     From: Baruch de Spinoza (The Ethics [1675], IApp)
     A reaction: The point is that a being with infinite attributes cannot be in need of anything, and hence God merely exists, but does not have a purpose. Hence falling in line with God's purposes cannot be an aim of a human religion.
28. God / A. Divine Nature / 3. Divine Perfections
God is a being with infinite attributes, each of them infinite or perfect [Spinoza]
     Full Idea: I define God as a being consisting in infinite attributes, whereof each is infinite or supremely perfect.
     From: Baruch de Spinoza (Letters to Oldenburg [1665], 1661)
     A reaction: This seems to me the glorious culmination of the hyperbolic conception of God that expands steadily from wood spirits through Zeus, to eventually mop up everything in nature, and then everything that can be imagined beyond nature. All very silly.
God no more has human perfections than we have animal perfections [Spinoza]
     Full Idea: To ascribe to God those attributes which make a man perfect would be as wrong as to ascribe to a man the attributes that make perfect an elephant or an ass.
     From: Baruch de Spinoza (Letters to Blijenburgh [1665], 1665), quoted by Matthew Stewart - The Courtier and the Heretic Ch.10
     A reaction: This would be a difficulty for Aquinas's Fourth Way (Idea 1432), and one which I think Aquinas might acknowledge, given his desire that we should be humble when trying to comprehend God (Idea 1410). It leaves us struggling to grasp the concept of God.
28. God / A. Divine Nature / 6. Divine Morality / c. God is the good
To say that God promotes what is good is false, as it sets up a goal beyond God [Spinoza]
     Full Idea: Those who maintain that God acts in all things with a view of promoting what is good are very far from the truth. For they seem to set up something beyond God, which does not depend on God, but which God looks to as an exemplar or goal.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 33)
     A reaction: That is, Spinoza agrees with Euthyphro, and disagrees with Socrates (see Idea 337). Personally I agree with Socrates, but then I am not 'intoxicated with God' as Spinoza was. If God isn't good, why worship Him?
28. God / B. Proving God / 2. Proofs of Reason / a. Ontological Proof
Spinoza says a substance of infinite attributes cannot fail to exist [Spinoza, by Lord]
     Full Idea: Spinoza does not argue from the concept of God to his existence; he argues that a substance of infinite attributes cannot not exist.
     From: report of Baruch de Spinoza (The Ethics [1675], I Def 6) by Beth Lord - Spinoza's Ethics 1 P11
     A reaction: Lord is explicit that this is NOT the argument used by Anselm and Descartes. I'm not clear why there has to be a substance of infinite attributes, but presumably that is explained somewhere.
Denial of God is denial that his essence involves existence, which is absurd [Spinoza]
     Full Idea: God, or substance consisting of infinite attributes, each one of which expresses eternal and infinite essence, necessarily exists. If this be denied, conceive that God does not exist. But then his essence does not involve existence, which is absurd.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 11)
     A reaction: Not a very powerful version of the ontological argument. Gaunilo offered an island which has existence as part of its essence, which would pass the same test.
God is being as such, and you cannot conceive of the non-existence of being [Spinoza, by Lord]
     Full Idea: Spinoza argues that you cannot conceive the non-existence of God because you cannot conceive the non-existence of being. God, or a substance of infinite attributes, is being as such.
     From: report of Baruch de Spinoza (The Ethics [1675], I Pr 11) by Beth Lord - Spinoza's Ethics I P11
     A reaction: I'm not clear why I cannot conceive of nothing whatever existing. I can conceive of my fridge being empty, so conceiving non-being is not off limits. Not that inconceivability is an infallible guide to impossibility…
God must necessarily exist, because no reason can be given for his non-existence [Spinoza]
     Full Idea: A thing necessarily exists if no cause or reason be granted which prevents its existence. No cause can be given which prevents the existence of God, or which destroys his existence, so we must conclude that he necessarily exists.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 11)
     A reaction: I can't think of any reason why there shouldn't be a giant rat which fills a large proportion of the universe. Indeed, it may be the missing 'dark matter'. So presumably it has necessary existence. Proving non-existence is obviously tricky.
Some things makes me conceive of it as a thing whose essence requires its existence [Spinoza]
     Full Idea: By cause of itself, I understand that, whose essence involves existence; or that, whose nature cannot be conceived unless existing.
     From: Baruch de Spinoza (The Ethics [1675], I Def 1)
     A reaction: Obviously he has God in mind, but might this apply to abstract existence. Can I conceive of the number seven, while also conceiving that there is no such number? Compare Pegasus.
28. God / B. Proving God / 2. Proofs of Reason / b. Ontological Proof critique
If a thing can be conceived as non-existing, its essence does not involve existence [Spinoza]
     Full Idea: If a thing can be conceived as non-existing, its essence does not involve existence.
     From: Baruch de Spinoza (The Ethics [1675], I Ax 7)
     A reaction: This points straight at the modern question of whether conceivability is a sufficient test for possibility. Personally I am close to Hume on this one. Necessary existence may not be ridiculous, but it is beyond human capacity to assert its occurrence.
28. God / B. Proving God / 2. Proofs of Reason / d. Pascal's Wager
If death is annihilation, belief in heaven is a cheap pleasure with no disappointment [Peirce]
     Full Idea: If death is annihilation, then the man who believes that he will certainly go straight to heaven when he dies, provided he have fulfilled certain simple observances in this life, has a cheap pleasure which will not be followed by the least disappointment.
     From: Charles Sanders Peirce (The Fixation of Belief [1877], p.12)
     A reaction: This is a nicely wicked summary of one side of Pascal's options. All the problems of the argument are built into Peirce's word "cheap". Peirce goes on to talk about ostriches burying their heads.
28. God / B. Proving God / 3. Proofs of Evidence / e. Miracles
Trying to prove God's existence through miracles is proving the obscure by the more obscure [Spinoza]
     Full Idea: Those who endeavour to establish God's existence and the truth of religion by means of miracles seek to prove the obscure by what is more obscure.
     From: Baruch de Spinoza (Letters to Oldenburg [1665], 1675?)
     A reaction: Nicely put. On the whole this has to be right, but one must leave open a possibility. If there is a God, and He seeks to prove Himself by a deed, are we saying this is impossible? Divine intervention might be the best explanation of something.
Priests reject as heretics anyone who tries to understand miracles in a natural way [Spinoza]
     Full Idea: Anyone who seeks the true cause of miracles, and strives to understand natural phenomena as an intelligent being, and not to gaze at them like a fool, is denounced as an impious heretic by those whom the masses adore as interpreters of nature and gods.
     From: Baruch de Spinoza (The Ethics [1675], IApp)
     A reaction: A rather bitter personal remark, by someone who was driven out of Amsterdam as a heretic. Presumably the heresy is not aggressive a priori naturalism, but mere openness to the possibility of natural explanations of miracles.
28. God / C. Attitudes to God / 2. Pantheism
That God is the substance of all things is an ill-reputed doctrine [Leibniz on Spinoza]
     Full Idea: That God is the very nature or substance of all things is the sort of doctrine of ill repute which a recent writer, subtle indeed, though profane, either introduced to the world or revived.
     From: comment on Baruch de Spinoza (The Ethics [1675], I) by Gottfried Leibniz - On Nature Itself (De Ipsa Natura) §08
     A reaction: This is clearly a comment on Spinoza. Leibniz seems to have spent his whole life in shock after his meeting with Spinoza.
The human mind is part of the infinite intellect of God [Spinoza]
     Full Idea: The human mind is part of the infinite intellect of God.
     From: Baruch de Spinoza (The Ethics [1675], II Pr 11)
     A reaction: What is the difference between being a part of something which totally fails to communicate with the whole, and being separate from the whole? Spinoza's proposal strikes me as daft.
God is the efficient cause of essences, as well as of existences [Spinoza]
     Full Idea: God is not only the efficient cause of the existence of things, but also of their essence.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 25)
     A reaction: This is close to Leibniz's view that the so-called 'laws of nature' are not imposed by God from outside, but are rooted with nature, in the essences of what has been created (which is modern scientific essentialism).
Everything is in God, and nothing exists or is thinkable without God [Spinoza]
     Full Idea: Whatever is, is in God, and nothing can either be or be conceived without God.
     From: Baruch de Spinoza (The Ethics [1675], I Pr 15)
     A reaction: Presumably atheists are not very good at conceiving, because they don't understand properly. This is the pantheism for which Spinoza became famous, or notorious. Critics said he was a closet atheist.
28. God / C. Attitudes to God / 4. God Reflects Humanity
A talking triangle would say God is triangular [Spinoza]
     Full Idea: If a triangle could speak it would say that God is eminently triangular.
     From: Baruch de Spinoza (Letters to Blijenburgh [1665], 1665), quoted by Matthew Stewart - The Courtier and the Heretic Ch.10
     A reaction: Spinoza had a rather appealing waspish wit. This nicely dramatises an ancient idea (Idea 407). You can, of course, if you believe in God, infer some of His characteristics from His creation. But then see Hume: Ideas 1439, 6960, 6967, 1440.
28. God / C. Attitudes to God / 5. Atheism
In Spinoza, one could substitute 'nature' or 'substance' for the word 'God' throughout [Spinoza, by Stewart,M]
     Full Idea: In Spinoza's 'Ethics' one can substitute the word "Nature" (or "Substance", or even simply an X) for God throughout, and the logic of the argument changes little, if at all.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Matthew Stewart - The Courtier and the Heretic Ch.13
     A reaction: This claim, if correct, is the clearest statement of why we should really consider Spinoza one of the first atheists, despite his endless use of the word 'God'.
29. Religion / B. Monotheistic Religion / 2. Judaism
Hebrews were very hostile to other states, who had not given up their rights to God [Spinoza]
     Full Idea: Having transferred their right to God, the Hebrews believed their kingdom was the kingdom of God, that they alone were the children of God, and that other nations were enemies of God, whom for that reason they regarded with extreme hostility.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670], 17.23)
     A reaction: [He cites Psalm 139:21-2] So, according to Spinoza, they did not become the chosen people because they thought God had chosen then, but because they were the only state trying to align itself with God.
29. Religion / B. Monotheistic Religion / 5. Bible
The Bible has nothing in common with reasoning and philosophy [Spinoza]
     Full Idea: The Bible leaves reason absolutely free and has nothing in common with philosophy.
     From: Baruch de Spinoza (Tractatus Theologico-Politicus [1670])
     A reaction: Hm. The Bible may not contain reasoning, but it contains the fruits of reasoning, and it is obviously possible for reasoning to contradict its message.
29. Religion / D. Religious Issues / 2. Immortality / a. Immortality
Spinoza's theory of mind implies that there is no immortality [Spinoza, by Stewart,M]
     Full Idea: A final (and for his contemporaries, dreadful) consequence of Spinoza's theory of the mind is that there is no personal immortality.
     From: report of Baruch de Spinoza (The Ethics [1675]) by Matthew Stewart - The Courtier and the Heretic Ch.10
     A reaction: For Spinoza's view of the mind, see Idea 4308. The denial of immortality would also seem to be a consequence of modern emergentist views of the mind, which is espoused by religious people looking for a compromise between dualism and science.
After death, something eternal remains of the mind [Spinoza]
     Full Idea: The human mind cannot be absolutely destroyed with the body, but something of it remains which is eternal.
     From: Baruch de Spinoza (The Ethics [1675], V Pr 23)
     A reaction: This sounds contrary to Spinoza's monism of mind and body, but he seems to mean little more than that minds are reabsorbed into the whole. See Beth Lord's commentary [p.146]. Compare stoics on the subject.