The rulers of the state are the only persons who ought to have the privilege of lying, either at home or abroad they may be allowed to lie for the good of the state.

Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, and charm and gaiety to life and to everything.

Thinking: the talking of the soul with itself.

Human behavior flows from three main sources: desire, emotion, and knowledge.

And what, Socrates, is the food of the soul? Surely, I said, knowledge is the food of the soul.