Epictetus

“ For by your style of reasoning we should have to say of tumours also that they are produced for the good of the body, just because they occur, and in brief, that to err is in accordance with nature, just because practically all of us, or at least most of us, do err. Do you show me, therefore, how your conduct is in accordance with nature.—I cannot, said the man; but do you rather show me how it is not in accordance with nature, and not rightly done. ”

“ Come, tell me, are all the things that certain persons regard as good and fitting, rightly so regarded? And is it possible at this present time that all the opinions which Jews, and Syrians, and Egyptians and Romans hold on the subject of food are rightly held?—And how can it be possible?—But, I fancy, it is absolutely necessary, if the views of the Egyptians are right, that those of the others are not right ”

“ And in your case the other day, the cause of your running away was just that you wanted to do so; and another time, if you stay with her, it will be because you wanted to stay. And now you are going back to Rome, because you want to do so, and if you change your mind and want something else, you will not go. And, in brief, it is neither death, nor exile, nor toil, nor any such thing that is the cause of our doing, or of our not doing, anything, but only our opinions and the decisions of our will. ”