The Enchiridion of Epictetus is a short collection of Stoic precepts compiled by Arrian, a student of Epictetus. Epictetus was a Greek philosopher and a champion of Stoicism, a philosophy dedicated to tranquility of the mind and soul via practical, actionable advice. Popular in the ancient and medieval world, it has even found favor in the contemporary military; fighter pilot James Stockdale attributed his survival of over seven years as a prisoner of war to the way of thinking contained in this short work.