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← Era: Classical Greek

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Plato

428 BCE – 348 BCE · Athens · Academy

«The visible world is a shadow of the real one.»

Plato watched democratic Athens condemn to death the best man he knew. Everything grew from that shock: he spent the rest of his life writing dialogues in which the executed teacher goes on speaking, and he founded the Academy outside Athens – the first institution we would recognize as a university; it would run for nearly 900 years.

His central conviction is that the world we see is not the world that is. Beyond appearances lie eternal, unchanging Forms – the perfect Triangle of which every drawn triangle is a copy, the Good of which every good act is an echo. To know is not to gather sense-data; it is to ascend, through reasoning, from the cave of shadows into the sunlight of the Forms.

He wrote about everything: love (Symposium), death (Phaedo), justice (Republic), language (Cratylus), beauty (Phaedrus). Whitehead said all of Western philosophy is "a series of footnotes to Plato." This is only slightly an exaggeration.

Lineage

// If you read one thing

  • Republic, Book VII (Allegory of the Cave)

    Twelve pages. The most famous image in philosophy.

  • Symposium

    His most readable dialogue, a drinking party about love.