This concise manual of Stoic ethical advice was compiled by Arrian from the teachings of Epictetus in the early second century CE. It distils the core of Epictetus' philosophy into a practical guide for daily life.
Its central teaching — that we should focus only on what is within our power and accept what is not — has made it one of the most influential works of practical philosophy in Western history.
"Some things are under our control, while others are not under our control. Under our control are conception, choice, desire, aversion, and, in a word, everything that is our own doing."
— Enchiridion, 1