Enchiridion 43

Everything has two handles, by one of which it ought to be carried and by the other not. If your brother wrongs you, do not lay hold of the matter by the handle of the wrong that he is doing, because this is the handle by which the matter ought not to be carried; but rather by the other handle—that he is your brother, that you were brought up together, and then you will be laying hold of the matter by the handle by which it ought to be carried.

Epictetus, Enchiridion 43, translated by W. A. Oldfather

Every thing has two handles, the one by which it may be borne, the other by which it may not. If your brother acts unjustly, do not lay hold of the act by that handle wherein he acts unjustly, for this is the handle which cannot be borne: but lay hold of the other, that he is your brother, that he was nurtured with you, and you will lay hold of the thing by that handle by which it can be borne.

Epictetus, Enchiridion 43, translated by George Long

Everything has two handles, one by which you can carry it, the other by which you cannot. If your brother wrongs you, do not take it by that handle, the handle of his wrong, for you cannot carry it by that, but rather by the other handle—that he is a brother, brought up with you, and then you will take it by the handle that you can carry by.

Epictetus, Enchiridion 43, translated by P. E. Matheson