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5893
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A wise man has integrity, firmness of will, nobility, consistency, sobriety, patience [Cicero]
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Full Idea:
The wise man does nothing of which he can repent, nothing against his will, does everything nobly, consistently, soberly, rightly, not looking forward to anything as bound to come, is not astonished at any novel occurrence, abides by his own decisions.
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From:
M. Tullius Cicero (Tusculan Disputations [c.44 BCE], V.xxviii)
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A reaction:
Notice that the wise man never exhibits weakness of will (an Aristotelian virtue), and is consistent (as Kant proposed), and is patient (as the Stoics proposed). But Cicero doesn't think he should busy himself maximising happiness.
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16744
|
All powers can be explained by obvious features like size, shape and motion of matter [Descartes]
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Full Idea:
There are no powers in stones and plants that are not so mysterious that they cannot be explained …from principles that are known to all and admitted by all, namely the shape, size, position, and motion of particles of matter.
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From:
René Descartes (Principles of Philosophy [1646], IV.187), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 23.6
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A reaction:
This is an invocation of 'categorical' properties, against dispositions. I take this to be quite wrong. The explanation goes the other way. What supports the structures; what drives the motion; what initiates anything?
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5016
|
Five universals: genus, species, difference, property, accident [Descartes]
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Full Idea:
The five commonly enumerated universals are: genus, species, difference, property and accident.
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From:
René Descartes (Principles of Philosophy [1646], I.59)
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A reaction:
Interestingly, this seems to be Descartes passing on his medieval Aristotelian inheritance, in which things are defined by placing them in a class, and then noting what distinguishes them within that class.
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16633
|
A substance has one principal property which is its nature and essence [Descartes]
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Full Idea:
Each substance has one principal property that constitutes its nature and essence, to which all its other properties are referred. Extension in length, breadth, and depth constitutes the nature of corporeal substance; and thought of thinking substances.
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From:
René Descartes (Principles of Philosophy [1646], I.53), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 08.3
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A reaction:
Property is likely to be 'propria', which is a property distinctive of some thing, not just any old modern property. This is quite a strikingly original view of the nature of essence. Descartes despised 'substantial forms'.
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5005
|
I think, therefore I am, because for a thinking thing to not exist is a contradiction [Descartes]
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Full Idea:
There is a contradiction in conceiving that what thinks does not (at the same time as it thinks) exist. Hence this conclusion I think, therefore I am, is the first and most certain that occurs to one who philosophises in an orderly way.
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From:
René Descartes (Principles of Philosophy [1646], I.07)
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A reaction:
The classic statement of his argument. The significance here is that it seems to have the structure of an argument, as it involves 'philosophising', which leads to a 'contradiction', and hence to the famous conclusion. It is not just intuitive.
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5006
|
'Thought' is all our conscious awareness, including feeling as well as understanding [Descartes]
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Full Idea:
By the word 'thought' I understand everything we are conscious of as operating in us. And that is why not only understanding, willing, imagining, but also feeling, are here the same thing as thinking.
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|
From:
René Descartes (Principles of Philosophy [1646], I.09)
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|
A reaction:
There is a bit of tension here between Descartes' correct need to include feeling in thought for his Cogito argument, and his tendency to dismiss animal consciousness, on the grounds that they only sense things, and don't make judgements.
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5012
|
'Nothing comes from nothing' is an eternal truth found within the mind [Descartes]
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|
Full Idea:
The proposition 'nothing comes from nothing' is not to be considered as an existing thing, or the mode of a thing, but as a certain eternal truth which has its seat in our mind and is a common notion or axiom.
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|
From:
René Descartes (Principles of Philosophy [1646], I.49)
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A reaction:
There is a tension here, in his assertion that it is 'eternal', but 'not existing'. How does one distinguish an innate idea from an innate truth? 'Eternal' sounds like an external guarantee of truth, but being 'in our mind' sounds less reliable.
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5004
|
We can know basic Principles without further knowledge, but not the other way round [Descartes]
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Full Idea:
It is on the Principles, or first causes, that the knowledge of other things depends, so the Principles can be known without these last, but the other things cannot reciprocally be known without the Principles.
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|
From:
René Descartes (Principles of Philosophy [1646], Pref)
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|
A reaction:
A particularly strong assertion of foundationalism, as it says that not only must the foundations exist, but also we must actually know them. This sounds false, as elementary knowledge then seems to require far too much sophistication.
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5884
|
How can one mind perceive so many dissimilar sensations? [Cicero]
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|
Full Idea:
Why is it that, using the same mind, we have perception of things so utterly unlike as colour, taste, heat, smell and sound?
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|
From:
M. Tullius Cicero (Tusculan Disputations [c.44 BCE], I.xx.47)
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|
A reaction:
This leaves us with the 'binding problem', of how the dissimilar sensations are pulled together into one field of experience. It is a nice simple objection, though, to anyone who simplistically claims that the mind is self-evidently unified.
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|
5887
|
The soul has a single nature, so it cannot be divided, and hence it cannot perish [Cicero]
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|
Full Idea:
In souls there is no mingling of ingredients, nothing of two-fold nature, so it is impossible for the soul to be divided; impossible, therefore, for it to perish either; for perishing is like the separation of parts which were maintained in union.
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|
From:
M. Tullius Cicero (Tusculan Disputations [c.44 BCE], I.xxix.71)
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|
A reaction:
Cicero knows he is pushing his luck in asserting that perishing is a sort of division. Why can't something be there one moment and gone the next? He appears to be in close agreement with Descartes about being a 'thinking thing'.
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|
5886
|
Like the eye, the soul has no power to see itself, but sees other things [Cicero]
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Full Idea:
The soul has not the power of itself to see itself, but, like the eye, the soul, though it does not see itself, yet discerns other things.
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|
From:
M. Tullius Cicero (Tusculan Disputations [c.44 BCE], I.xxvii)
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|
A reaction:
The soul is a complex item which contributes many layers of interpretation to what it sees, so there is scope for parts of the soul seeing other parts. Somewhere in the middle Cicero seems to be right - there is an elusive something we can't get at.
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|
5011
|
There are two ultimate classes of existence: thinking substance and extended substance [Descartes]
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|
Full Idea:
I observe two ultimate classes of things: intellectual or thinking things, pertaining to the mind or to thinking substance, and material things, pertaining to extended substance or to body.
|
|
From:
René Descartes (Principles of Philosophy [1646], I.48)
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|
A reaction:
This is clear confirmation that Descartes believed the mind is a substance, rather than an insubstantial world of thinking. It leaves open the possibility of a different theory: that mind is not a substance, but is a Platonic adjunct to reality.
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|
5018
|
Even if tightly united, mind and body are different, as God could separate them [Descartes]
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|
Full Idea:
Even if we suppose God had united a body and a soul so closely that they couldn't be closer, and made a single thing out of the two, they would still remain distinct, because God has the power of separating them, or conserving out without the other.
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|
From:
René Descartes (Principles of Philosophy [1646], I.60)
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|
A reaction:
If Descartes lost his belief in God (after discussing existence with Kant) would he cease to be a dualist? This quotation seems to be close to conceding a mind-body relationship more like supervenience than interaction.
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|
5885
|
Souls contain no properties of elements, and elements contain no properties of souls [Cicero]
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|
Full Idea:
No beginnings of souls can be found on earth; there is no combination in souls that could be born from earth, nothing that partakes of moist or airy or fiery; for in those elements there is nothing to possess the power of memory, thought, or reflection.
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|
From:
M. Tullius Cicero (Tusculan Disputations [c.44 BCE], I.xxvi.66)
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|
A reaction:
Interesting, but I think magnetism is an instructive analogy, which has weird properties which we never perceive in elements (though it is there, buried deep - suggesting panpsychism). Cicero would be disconcerted to find that fire isn't an element.
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|
5008
|
The greatest perfection of man is to act by free will, and thus merit praise or blame [Descartes]
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|
Full Idea:
That the will should extend widely accords with its nature, and it is the greatest perfection in man to be able to act by its means, that is, freely, and by so doing we are in peculiar way masters of our actions, and thereby merit praise or blame.
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|
From:
René Descartes (Principles of Philosophy [1646], I.37)
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|
A reaction:
This seems to me to be a deep-rooted and false understanding which philosophy has inherited from theology. It doesn't strike me that there must an absolute 'buck-stop' to make us responsible. Why is it better for a decision to appear out of nowhere?
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|
15987
|
Physics only needs geometry or abstract mathematics, which can explain and demonstrate everything [Descartes]
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|
Full Idea:
I do not accept or desire any other principle in physics than in geometry or abstract mathematics, because all the phenomena of nature may be explained by their means, and sure demonstrations can be given of them.
|
|
From:
René Descartes (Principles of Philosophy [1646], 2.64), quoted by Peter Alexander - Ideas, Qualities and Corpuscles 7
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|
A reaction:
This is his famous and rather extreme view, which might be described as hyper-pythagoreanism (by adding geometry to numbers). It seems to leave out matter, forces and activity.
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|
16601
|
Matter is not hard, heavy or coloured, but merely extended in space [Descartes]
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|
Full Idea:
The nature of matter, or body viewed as a whole, consists not in its being something which is hard, heavy, or colored, or which in any other way affects the senses, but only in its being a thing extended in length, breadth and depth.
|
|
From:
René Descartes (Principles of Philosophy [1646], 2.4), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 04.5
|