Truth is its own reward.

I don't know anything that gives me greater pleasure, or profit either, than talking or listening to philosophy. But when it comes to ordinary conversation, such as the stuff you talk about financiers and the money market, well, I find it pretty tiresome personally, and I feel sorry that my friends should think they're being very busy when they're really doing absolutely nothing. Of course, I know your idea of me: you think I'm just a poor unfortunate, and I shouldn't wonder if your right. But then I dont THINK that you're unfortunate - I know you are.

If a man says that it is right to give every one his due, and therefore thinks within his own mind that injury is due from a just man to his enemies but kindness to his friends, he was not wise who said so, for he spoke not the truth, for in no case has it appeared to be just to injure any one.

Rhetoric is the art of ruling the minds of men.

At the Egyptian city of Naucratis there was a famous old god whose name was Theuth; the bird which is called the Ibis was sacred to him, and he was the inventor of many arts, such as arithmetic and calculation and geometry and astronomy and draughts and dice, but his great discovery was the use of letters.

The ultimate design of the Mysteries ... was to lead us back to the principles from which we descended, ... a perfect enjoyment of intellectual [spiritual] good.

Their military training will ensure success in war, but they must maintain unity by not allowing the state to grow to large, and by ensuring that the measures for promotion and demotion from one class to another are carried out. Above all they must maintain the educational system unchanged; for on education everything else depends, and it is an illusion to imagine that mere legislation without it can effect anything of consequence.