To know, is to know that you know nothing.

I prefer to be refuted than to refute, for it is a greater good for oneself to be freed from the greatest evil than to free another.

Those who want the fewest things are nearest to the gods.

Since I am convinced that I wrong no one, I am not likely to wrong myself.

...one thing I am ready to fight for as long as I can, in word and act: that is, that we shall be better, braver and more active men if we believe it right to look for what we don't know than if we believe there is no point in looking because what we don't know we can never discover.

A system of morality that is based on relative emotional values is a mere illusion, a thoroughly vulgar conception that has nothing sound in it and nothing true.

Our purpose in founding the city was not to make any one class in it surpassingly happy, but to make the city as a whole as happyas possible.