I laugh at those who think they can damage me. They do not know who I am, they do not know what I think, they cannot even touch the things which are really mine and with which I live.

One that desires to excel should endeavor in those things that are in themselves most excellent.

The appearance of things to the mind is the standard of every action to man.

Learn to distinguish what you can and can't control. Within our control are our own opinions, aspirations, desires and the things that repel us. They are directly subject to our influence.

We have two ears and one mouth so that we can listen twice as much as we speak.

The essence of philosophy is that a man should so live that his happiness shall depend as little as possible on external things.

Give me by all means the shorter and nobler life, instead of one that is longer but of less account!