True wisdom lies in one's confession about the limits of one's knowledge.

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.

One ought not to return injustice, nor do evil to anybody in the world, no matter what one may have suffered from them.

...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.

See one promontory, one mountain, one sea, one river and see all.

Envy is the ulcer of the soul.

Why do you wonder that globetrotting does not help you, seeing that you always take yourself with you? The reason that set you wandering is ever at your heels.