Moderation, which consists in indifference about little things, and in a prudent and well-proportioned zeal about things of importance, can proceed from nothing but true knowledge, which has its foundation in self-acquaintance.

The wisest have the most authority.

To win over your bad self is the grandest and foremost of victories.

I'm trying to think, don't confuse me with facts.

The man who arrives at the doors of artistic creation with none of the madness of the Muses would be convinced that technical ability alone was enough to make an artist... what that man creates by means of reason will pale before the art of inspired beings.

I am the wisest man alive, for I know one thing, and that is that I know nothing.

Thus rhetoric, it seems, is a producer of persuasion for belief, not for instruction in the matter of right and wrong ... And so the rhetorician's business is not to instruct a law court or a public meeting in matters of right and wrong, but only to make them believe.