A handbook of Stoic philosophy, compiled by Epictetus's student Arrian, teaching how to distinguish what is in our power from what is not. Epictetus was born a slave, became free, was exiled from Rome, and taught philosophy until his death. The advice is practical: do not wish things to happen as you want, but as they do happen. The prose is compressed, aphoristic, designed for memorization. Stoicism has survived because these pages remain useful. The handbook is brief enough to carry, literal enough to follow. What is in your power? Only your judgments. Everything else is not yours.