Discourses, "To the Administrator of the Free Cities Who Was an Epicurean" (§1)

“When the administrator came to visit him, and the man was an Epicurean, Epictetus said, It is proper for us who are not philosophers to inquire of you who are philosophers, as those who come to a strange city inquire of the citizens and those who are acquainted with it, what is the best thing in the world, in order that we also after inquiry may go in quest of that which is best and look at it, as strangers do with the things in cities. For that there are three things which relate to man—soul, body, and things external, scarcely any man denies.”