Freedom and happiness come from understanding - and working with - our limits. Begin at once a program of self-mastery. Stick with your purpose. Do not seek external approval. Do not worry about anything outside of your control. The only things you command are your thoughts and actions. We choose our response. Stop aspiring to be anyone other than your own best self: for that does fall within your control.

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

To the rational being only the irrational is unendurable, but the rational is endurable.

It takes more than just a good looking body. You've got to have the heart and soul to go with it.

Nothing truly stops you. Nothing truly holds you back. For your own will is always within your control.

You ought to choose both physician and friend, not the most agreeable, but the most useful.

Cowardice, the dread of what will happen.