The key is to keep company only with people who uplift you, whose presence calls forth your best.
People are not disturbed by things, but by the view they take of them.
He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.
For it is not death or hardship that is a fearful thing, but the fear of death or hardship.
Any person capable of angering you becomes your master; he can anger you only when you permit yourself to be disturbed by him.