A soul which is conversant with virtue is like an ever flowing source, for it is pure and tranquil and potable and sweet and communicative (social) and rich and harmless and free from mischief.
EpictetusKeep your attention focused entirely on what is truly your own concern, and be clear that what belongs to others is their business and none of yours.
EpictetusI must die. I must be imprisoned. I must suffer exile. But must I die groaning? Must I whine as well? Can anyone hinder me from going into exile with a smile? The master threatens to chain me: what say you? Chain me? My leg you will chain--yes, but not my will--no, not even Zeus can conquer that.
Epictetus