Make sure then that you are not somehow cheating me, my good sir, and that though I am your friend. For, while we are enquiring who has the truth in philosophy, you have prematurely seized on the answer and taken it and assigned it to the Stoics, when you say that they are the ones who make twice two equal four, although it is not clear that this is so. For the Epicureans and the Platonists would say that they get this result, while you Stoics call it five or seven. Or do you not think that this is what they are doing when you think that only the beautiful is good, while the Epicureans say it is pleasure? And when you say that all things are corporeal, while Plato thinks that there is an incorporeal element in what exists? No, as I said, you very arrogantly lay hold of the bone of contention as being the undisputed property of the Stoics, and give it to them to possess; and yet, when the others are asserting rival claims and saying that it is theirs, then, I think, there is every need for a judgment. If it becomes quite clear then that it is the privilege of the Stoics alone to think that twice two are four, it is time for the rest to be quiet. But as long as they contest this very claim, we must give a hearing to all alike, or realise that we shall be thought to be giving a biased judgment.