Vitae philosophorum

Euclides was a native of Megara on the Isthmus,[*](So called to distinguish it from Megara Hyblaea, in Sicily.)or according to some of Gela, as Alexander states in his Successions of Philosophers. He applied himself to the writings of Parmenides, and his followers were called Megarians after him, then Eristics, and at a later date Dialecticians, that name having first been given to them by Dionysius of Chalcedon because they put their arguments into the form of question and answer. Hermodorus tells us that, after the death of Socrates, Plato and the rest of the philosophers came to him, being alarmed at the cruelty of the tyrants. He held the supreme good to be really one, though called by many names, sometimes wisdom, sometimes God, and again Mind, and so forth. But all that is contradictory of the good he used to reject, declaring that it had no existence.