Chapter 18
When a raven happens to croak unluckily, don't allow the appearance hurry you away with it, but immediately make the distinction to yourself, and say, "None of these things are foretold to me; but either to my paltry body, or property, or reputation, or children, or wife. But to me all omens are lucky, if I will. For whichever of these things happens, it is in my control to derive advantage from it."
When a raven happens to croak unluckily, be not overcome by appearances, but discriminate, and say, " Nothing is portended to me; but either to my paltry body, or property, or reputation, or children, or wife. But to me all portents are lucky, if I will. For whatsoever happens, it belongs to me to derive advantage therefrom."
Epictetus, Enchiridion 18. Translated by Elizabeth Carter (1758). The Stoic Library.