I already know what you wish to ask; there is no need for you to say anything; your countenance speaks for you. “If anyone has done us a service for his own sake, are we,” you ask, “under any obligation to him? For I often hear you complain that there are some things that men bestow upon themselves, but charge them up to others.” I will tell you, Liberalis; but first let me break up that question, and separate what is fair from what is unfair. For it makes a great difference whether anyone gives us a benefit for his own sake, or for his own sake and ours. He who looks wholly to his own interest, and does us a service only because he could not otherwise do himself a service, seems to me to be in a class with the man who provides food for his flock summer and winter; in a class with the man who, in order that he may sell his captives to greater advantage, feeds them, stuffs them as fat as oxen, and rubs them down; in a class with the fencing-master who takes the greatest pains in training and equipping his troop of gladiators. There is a great difference, as Cleanthes says, between benefaction and trade.