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Wellsprings
cosmology

Time

χρόνος

Is time the ticking measure of change, or a flowing shadow of an unchanging eternity? Greek philosophy gave both classic answers.

Chronos, time itself, was understood by ancient philosophers as inseparable from motion and change. Aristotle defined time as the measure or "number" of motion—not something that exists independently but rather the way we quantify movement from one state to another. Plato approached it differently, calling time a moving image of eternity, suggesting that the temporal world constantly imitates the eternal and unchanging realm of Forms. Both thinkers grappled with whether time requires change to exist at all.

The Stoics took a practical stance, refusing to accept gaps in time and insisting that the present moment, though real and experienced, cannot be infinitely small or divisible into nothingness. This emphasis on the continuous present shaped how they understood causation and fate: everything flows in an unbroken sequence. This contrasts sharply with Platonic concerns that only the eternal realm escapes time's grip entirely; even the soul's immortality involves participation in timelessly unchanging being rather than temporal succession.

Where this idea shows up

65 Greek sources·5 Jewish-canon citations

Where to read it