First learn the meaning of what you say, and then speak.

It is not he who reviles or strikes you who insults you, but your opinion that these things are insulting.

It is difficulties that show what men are.

If I was a nightingale I would sing like a nightingale; if a swan, like a swan. But since I am a rational creature my role is to praise God.

Whoever does not regard what he has as most ample wealth, is unhappy, though he be master of the world.

First tell yourself what you want to be, then do what you need to do.

The soul's impurity consists in bad judgements, and purification consists in producing in it right judgements, and the pure soul is one which has right judgements, for this alone is proof against confusion and pollution in its functions.