Rethoric like this is to be expected of an emancipated slave I suppose. Not only can a slave really be free, a master can also really be a slave. The person who followed these precepts would achieve happiness. As part of the universal city that is the universe, human beings have a duty of care to all fellow humans.

Suffering arises from trying to control what is uncontrollable, or from neglecting what is within our power. Individuals, however, are responsible for their own actions which they can examine and control through rigorous self-discipline. To Epictetus, all external events are determined by fate, and are thus beyond our control, but we can accept whatever happens calmly and dispassionately. Philosophy, he taught, is a way of life and not just a theoretical discipline. His teachings were noted down and published by his pupil Arrian in his Discourses. He was probably born a slave at Hierapolis, Phrygia (present day Pamukkale, Turkey), and lived in Rome until his exile to Nicopolis in northwestern Greece, where he lived most of his life and died.

Of Human Freedom by Epictetus