Epictetus

It's impossible for a man to learn what he thinks he already knows.

It's not what you endure, but how you endure it that matters.

No man is free who is not master of himself.

It's not things that upset us, but our judgments about things.

The more we value things outside our control, the less control we have.

If you want to be rich, do not add to your money, but subtract from your desire.

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

Don't seek for everything to happen as you wish it would, but rather wish for everything to happen as it does happen.

First say to yourself what you would be; and then do what you have to do.

To be even-minded is the greatest virtue.