{i} (c540-470 BC) Greek philosopher who stated that reason is the only constant in an ever-changing world
a presocratic Greek philosopher who said that fire is the origin of all things and that permanence is an illusion as all things are in perpetual flux (circa 500 BC)
heraclitus
الواصلة
He·ra·cli·tus
النطق
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() From Latin Hēraclītus, from Ancient Greek Ἡράκλειτος (Hērakleitos).