Original: Heraclitus of Ephesus ( Ancient Greek : -- ; c. 535 c. 475 BCE ) was a pre-Socratic Greek philosopher , a native of Ephesus , Ionia , on the coast of Asia Minor .
Simplified: 535 -- 475 BC ) was a pre-Socratic Greek philosopher , a native of Ephesus , Ionia , on the coast of Asia Minor .