You have driven away his cattle, you have murdered his slave, you have in your possession plate which you have not paid for. After valuing what each has received, I order you, who came to this court as a creditor, to leave it as a debtor.” In like manner a balance is struck between benefits and injuries. In many cases, I repeat, a benefit is not taken away from him who receives it, and yet it lays him under no obligation, if the giver has repented of giving it, called himself unhappy because he gave it, sighed or made a wry face while he gave it; if he thought that he was throwing it away rather than giving it, if he gave it to please himself, or to please anyone except me, the receiver; if he persistently makes himself offensive by boasting of what he has done, if he brags of his gift everywhere, and makes it a misery to me, then indeed the benefit remains in my hands, but I owe him nothing for it, just as sums of money to which a creditor has no legal right are owed to him, but cannot be claimed by him.