Man is troubled not by events, but by the meaning he gives them.
When our friends are present we ought to treat them well; and when they are absent, to speak of them well.
We are not disturbed by what happens to us, but by our thoughts about what happens to us.
Don't regard what anyone says of you, for this, after all, is no concern of yours.
Difficulties are things that show a person what they are.
We must be afraid of neither poverty nor exile nor imprisonment; of fear itself only should we be afraid.