Heraclitus, son of Vloson, was born about 535 BCE in Ephesos, the second great Greek Ionian city. He was a man of strong and independent philosophical spirit. Unlike the Milesian philosophers whose subject was the material beginning of the world, Heraclitus focused instead on the internal rhythm of nature, which moves and regulates things, namely, the Logos (Rule). Heraclitus is the philosopher of the eternal change. He expresses the notion of eternal change in terms of the continuous flow of the river, which always renews itself. Heraclitus accepted only one material source of natural substances, the Pyr (Fire). This Pyr is the essence of Logos, which creates an infinite and uncorrupted world, without beginning. It converts this world into various shapes as a harmony of the opposites. The composition of opposites sustains everything in nature. "Good" and "bad" are simply opposite sides of the same thing. “To God all things are beautiful and good and just, but men have supposed some things to be unjust, others just”. Scholars place his death at about 475 BCE.
Heraclitus lived in Ephesus, an important city on the Ionian coast of Asia Minor, not far from Miletus, the birthplace of philosophy. We know