Heraclitus (c. 544–c. 483 BC)
Greek philosopher who believed that the cosmos is in a ceaseless state of flux and motion, fire being the fundamental material that accounts for all change and motion in the world.
Nothing in the world ever stays the same, hence the dictum, ‘one cannot step in the same river twice’.
| Wisdom came from understanding this eternal dynamic, which unified the diversity of nature, as he wrote in On Nature. Heraclitus was born in Ephesus. |
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