THE ENCHIRIDION Ch. 18 (source: Project Gutenberg)
When a raven happens to croak unluckily, be not overcome by appearances, but discriminate and say, “Nothing is portended to me, 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.”