Enchiridion 18

When a raven croaks inauspiciously, let not the external impression carry you away, but straightway draw a distinction in your own mind, and say, "None of these portents are for me, but either for my paltry body, or my paltry estate, or my paltry opinion, or my children, or my wife. But for me every portent is favourable, if I so wish; for whatever be the outcome, it is within my power to derive benefit from it."

Epictetus, Enchiridion 18, translated by W. A. Oldfather

When a raven has croaked inauspiciously, let not the appearance hurry you away with it; but straightway make a distinction in your mind and say, None of these things is signified to me, but either to my poor body, or to my small property, or to my reputation, or to my children or to my wife: but to me all significations are auspicious if I choose. For whatever of these things results, it is in my power to derive benefit from it.

Epictetus, Enchiridion 18, translated by George Long

When a raven croaks with evil omen, let not the impression carry you away, but straightway distinguish in your own mind and say, 'These portents mean nothing to me; but only to my bit of a body or my bit of property or name, or my children or my wife. But for me all omens are favourable if I will, for, whatever the issue may be, it is in my power to get benefit therefrom.'

Epictetus, Enchiridion 18, translated by P. E. Matheson