AND when you are thus prepared and thus exercised to distinguish what belongs to others from your own; what is liable to restraint from what is not; to esteem your own property, the other not; to keep your desire, to keep your aversion carefully turned to this point; whom have you any longer to fear? — "No one." For about what should you be afraid? About what is your own, in which consists the essence of good and evil? And who hath any power over this? Who can take it away? Who can hinder you? No more than God can be hindered. But are you afraid for body, for possessions, for what belongs to others, for what is nothing to you? And what have you been studying all this while, but to distinguish between your own and not your own; what is in your power and what is not in your power; what is liable to restraint and what is not?
EPICTETUS. DISCOURSES. Book iv. §1. ¶12.