Ask yourself: Does this appearance (of events) concern the things that are within my own control or those that are not? If it concerns anything outside your control, train yourself not to worry about it.
EpictetusThere 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.
EpictetusRemember that you are an actor in a play, and that the Playwright chooses the manner of it: If he wants you to act a poor man you must act the part with all your powers; and so if your part be a cripple or a magistrate or a plain man. For your business is to act the character that is given you and act it well. The choice of the cast is Another's.
Epictetus