The Enchiridion or Handbook of Epictetus (Ἐγχειρίδιον Ἐπικτήτου, Enkheirídion Epiktḗtou) is a short manual of Stoic ethical advice compiled by Arrian, a 2nd-century disciple of the Greek philosopher Epictetus. Although the content is mostly derived from the Discourses of Epictetus, it is not a summary of the Discourses but rather a compilation of practical precepts. Eschewing metaphysics, Arrian focuses his attention on Epictetus's work applying philosophy to daily life. Thus, the book is a manual to show the way to achieve mental freedom and happiness in all circumstances.
The Enchiridion was well-known in the ancient world, and in the medieval period, it was specially adapted for use in Greek-speaking monasteries. In the 15th century it was translated into Latin, and then, with the advent of printing, into multiple European languages. It reached the height of popularity in the 17th century, in parallel with the Neostoicism movement.
The word "Enchiridion" (ἐγχειρίδιον) is an adjective meaning "in the hand" or "ready to hand". The word sometimes meant a handy sword, or dagger, but coupled with the word "book" (biblion, βιβλίον) it means a handy book or hand-book. Epictetus in the Discourses often speaks of principles which his pupils should have "ready to hand" (πρόχειρα). Common English translations of the title are Manual or Handbook.
The work consists of fifty-three short chapters typically consisting of a paragraph or two. It was compiled some time in the early 2nd century. The 6th-century philosopher Simplicius, in his Commentary on the work, refers to a letter written by Arrian which prefaced the text. In this letter Arrian stated that the Enchiridion was selected from the Discourses of Epictetus according to what he considered to be most useful, most necessary, and most adapted to move people's minds. Around half of the material in the Enchiridion has been shown to have been derived from the surviving four books of Discourses but variously modified. Other parts are presumed to be derived from the lost Discourses.