Men are not worried by things, but by their ideas about things. When we meet with difficulties, become anxious or troubled, let us not blame others, but rather ourselves. That is: our ideas about things.
EpictetusIf you would improve, submit to be considered wihout sense and foolish with respect to externals. Wish to be considered to know nothing; and if you shall seem to someone to be a person of importance, distrust yourself.
Epictetus