from The Enchiridion · tr. Thomas Wentworth Higginson (1865)
Chapter I
Of things some are in our power, and others are not. In our power are opinion, movement towards a thing, desire, aversion; and in a word, whatever are our own acts. Not in our power are the body, property, reputation, offices, and in a word, whatever are not our own acts.
This text is one of the sources behind Epictetus, one of the voices you can reflect with.