Let death and exile and every other thing which appears dreadful be daily before your eyes; but most of all death: and you will never think of anythi… - Epictetus

Don’t seek that all that comes about should come about as you wish, but wish that everything that comes about should come about just as it does, and then you’ll have a calm and happy life.

If you want to improve, be content to be thought foolish and stupid with regard to external things. Don't wish to be thought to know anything; and even if you appear to be somebody important to others, distrust yourself.

The philosopher's lecture room is a 'hospital': you ought not to walk out of it in a state of pleasure, but in pain; for you are not in good condition when you arrive.