If you are in Gyaros, do not let your mind dwell upon life at Rome, and all the pleasures it offered to you when living there, and all that would attend your return. Rather be intent on this--how he that lives in Gyaros may live in Gyaros like a man of spirit. And if you are at Rome, do not let your mind dwell upon the life at Athens, but study only how to live at Rome.
Finally, in the room of all other pleasures put this--the pleasure which springs from concious obedience to God.
