+Heraclitus was an ancient Greek philosopher from Ephesus, known for his doctrine of constant [Change](/wiki/change). He believed [Fire](/wiki/fire) to be the arche, the primary element, embodying ceaseless flux and the unity of opposites in the cosmos.
+## See also
+- [Pre-Socratics](/wiki/pre-socratics)
+- [Metaphysics](/wiki/metaphysics)
+- [Flux](/wiki/flux)
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