Heracletus Fragments - Greek Edition Author:Heraclitus Heraclitus of Ephesus, known as 'The Obscure,' was a pre-Socratic Greek philosopher from Ephesus in Asia Minor. As with other pre-Socratics, his writings only survive in fragments quoted by other authors. He disagreed with Thales, Anaximander, and Pythagoras about the nature of the ultimate substance, but instead claimed that the nature of ev... more »erything is change itself; he uses fire as a metaphor rather than his solution to material monism. This led to the belief that change is real, and stability illusory.« less