Don't regard what anyone says of you, for this, after all, is no concern of yours.

Be not diverted from your duty by any idle reflections the silly world may make upon you, for their censures are not in your power and should not be at all your concerns.

Don't just say you have read books. Show that through them you have learned to think better, to be a more discriminating and reflective person. Books are the training weights of the mind. They are very helpful, but it would be a bad mistake to suppose that one has made progress simply by having internalized their contents." Translation by Sharon Lebell

There is but one way to tranquility of mind and happiness, and that is to account no external things thine own, but to commit all to God.

Men are not troubled by things themselves, but by their thoughts about them

It is not so much what happens to you as how you think about what happens." Epictetus

Seek not good from without; seek it within yourselves, or you will never find it.