Greek philosopher (late 6th/early 5th-century BC)
Heraclitus of Ephesus (Ἡράκλειτος, Herakleitos; c. 535 BC – 475 BC) was a Greek philosopher, known for his doctrine of change being central to the universe, and for establishing the term Logos (λόγος) in Western philosophy as meaning both the source and fundamental order of the Cosmos.
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The death of fire is the birth of air, and the death of air is the birth of water. For it is death to souls to become water, and death to water to become earth. But water comes from earth; and from water, soul. Cold things become warm, and what is warm cools; what is wet dries, and the parched is moistened. And it is the same thing in us that is quick and dead, awake and asleep, young and old; the former are shifted and become the latter, and the latter in turn are shifted and become the former.