Idea

Ideas

15 concepts

Virtue

The excellence of character. For the Greeks, virtue was not merely moral goodness but the fulfillment of one's nature, being what a human can be at its best.

Theophrastus, Socrates, Plato, Aristotle +2

Logos

Reason, word, principle. The rational order that runs through all things, or the capacity in us to perceive it.

Heraclitus, Zeno of Citium, Plato, Aristotle

Justice

Giving each what is owed. For the Greeks, justice was not just law but the harmony of the soul and the city.

Socrates, Plato, Aristotle

Happiness

Eudaimonia: not pleasure, but flourishing. The Greeks asked not ‘are you happy?’ but ‘are you living well?’

Aristotle, Epicurus, Democritus, Pyrrho

Being

What is real? What truly exists? Parmenides asked the question, and philosophy has never stopped trying to answer it.

Gorgias, Anaximander, Parmenides, Plato +1

Nature

Physis: the way things grow, move, and are. To live according to nature was the first and last commandment of Greek philosophy.

Theophrastus, Anaximander, Anaximenes, Thales +6

Skepticism

The discipline of doubt. Not cynicism, but the honest admission that certainty may be beyond us.

Gorgias, Pyrrho, Socrates

Reason

The capacity to think, argue, and understand. The Greeks believed it is what makes us most fully human.

Thales, Parmenides, Socrates, Plato +2

Change

Is change real, or an illusion? Heraclitus said everything flows. Parmenides said nothing does. The debate defined metaphysics.

Anaximander, Anaximenes, Heraclitus, Parmenides +2

Moderation

Nothing in excess. The golden mean. The Greeks distrusted extremes and prized the disciplined middle.

Aristotle, Epicurus

Stoic Ethics

Virtue is the only good. Everything else (health, wealth, reputation) is indifferent. You control your judgments, nothing more.

Zeno of Citium

Natural Law

A law above all human laws, written into the structure of the cosmos itself. The Stoics said reason is that law.

Zeno of Citium

The Republic

Not a word for a building, but for an idea: the common good, the public thing, a government that belongs to its people.

Plato

Atoms & the Void

The universe is particles in empty space. Everything you see, from stars to your own thoughts, is atoms in motion.

Democritus, Epicurus

Inner Freedom

True freedom has nothing to do with chains. It is a state of mind: wanting only what is already in your power.

Diogenes