Heraclitus- 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) Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc. ...
Heraclitus, like Parmenides, postulated a model of nature and the universe which created the foundation for all other speculation on physics and metaphysics. The ideas that the universe is in constant change and that there is an underlying order or reason to this change—the Logos—form the esse...