Ideas of Heraclitus, by Theme

[Greek, c.540 - 480 BCE, Born and lived at Ephesus, on the coast of modern Turkey]

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1. Philosophy / A. Wisdom / 2. Wise People
Men who love wisdom must be inquirers into very many things indeed
1. Philosophy / D. Nature of Philosophy / 2. Invocation to Philosophy
Everyone has the potential for self-knowledge and sound thinking
1. Philosophy / D. Nature of Philosophy / 7. Despair over Philosophy
Reason is eternal, but men are foolish
2. Reason / B. Laws of Thought / 5. Opposites
Beautiful harmony comes from things that are in opposition to one another
A thing can have opposing tensions but be in harmony, like a lyre
5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
If everything is and isn't then everything is true, and a midway between true and false makes everything false
8. Modes of Existence / C. Powers and Dispositions / 4. Powers as Essence
The hidden harmony is stronger than the visible
9. Objects / A. Existence of Objects / 6. Nihilism about Objects
Everything gives way, and nothing stands fast
9. Objects / B. Unity of Objects / 3. Unity Problems / e. Vague objects
A mixed drink separates if it is not stirred
9. Objects / E. Objects over Time / 8. Continuity of Rivers
You can bathe in the same river twice, but not in the same river stage
It is not possible to step twice into the same river
9. Objects / E. Objects over Time / 13. No Identity over Time
If flux is continuous, then lack of change can't be a property, so everything changes in every possible way
12. Knowledge Sources / C. Rationalism / 1. Rationalism
Senses are no use if the soul is corrupt
12. Knowledge Sources / D. Empiricism / 4. Pro-Empiricism
When we sleep, reason closes down as the senses do
13. Knowledge Criteria / E. Relativism / 1. Relativism
Sea water is life-giving for fish, but not for people
Donkeys prefer chaff to gold
13. Knowledge Criteria / E. Relativism / 3. Subjectivism
Health, feeding and rest are only made good by disease, hunger and weariness
22. Metaethics / A. Value / 1. Nature of Value / e. Means and ends
If one does not hope, one will not find the unhoped-for, since nothing leads to it
22. Metaethics / B. The Good / 1. Goodness / f. Good as pleasure
If happiness is bodily pleasure, then oxen are happy when they have vetch to eat
22. Metaethics / B. The Good / 3. Pleasure / f. Dangers of pleasure
It is hard to fight against emotion, but harder still to fight against pleasure
22. Metaethics / C. Ethics Foundations / 1. Nature of Ethics / e. Ethical cognitivism
To God (though not to humans) all things are beautiful and good and just
22. Metaethics / C. Ethics Foundations / 1. Nature of Ethics / h. Against ethics
Good and evil are the same thing
23. Ethics / C. Virtue Theory / 2. Elements of Virtue Theory / e. Character
For man character is destiny
23. Ethics / D. Deontological Ethics / 2. Duty
Universal law is common to all, but most people live as if they have a private understanding
25. Society / E. State Functions / 1. The Law / a. Legal system
The people should fight for the law as if for their city-wall
26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / c. Ancient elements
Heraclitus says that at some time everything becomes fire
The sayings of Heraclitus are still correct, if we replace 'fire' with 'energy'
Heraclitus said sometimes everything becomes fire
Heraclitus said fire could be transformed to create the other lower elements
26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / g. The One
Reason tells us that all things are one
26. Natural Theory / B. Natural Kinds / 4. Source of Kinds
Logos is the source of everything, and my theories separate and explain each nature
27. Natural Reality / A. Classical Physics / 1. Mechanics / a. Explaining movement
All things are in a state of motion
27. Natural Reality / D. Cosmology / 2. Eternal Universe
The cosmos is eternal not created, and is an ever-living and changing fire
28. God / B. Proving God / 3. Proofs of Evidence / b. Teleological Proof
Heraclitus says intelligence draws on divine reason
29. Religion / A. Polytheistic Religion / 2. Paganism
Purifying yourself with blood is as crazy as using mud to wash off mud
29. Religion / D. Religious Issues / 1. Religious Commitment / a. Religious Belief
In their ignorance people pray to statues, which is like talking to a house