This, then, was the cause of Achilles' lamentation, not the death of Patroclus; for another man does not behave thus on the death of his companion; but it was because he chose to do so. And to you this was the very cause of your then running away, that you chose to do so; and on the other side, if you should stay with her, the reason will be the same. And now you are going to Rome because you choose; and if you should change your mind, you will not go thither. And in a word, neither death nor exile nor pain nor anything of the kind is the cause of our doing anything or not doing; but our own opinions and our wills.