Do You Italicize Quotes & Sayings

I knew that I was writing for an American audience and that if I sold foreign rights, they would retranslate the book to make it make sense to that language. But one thing that was really important to me was not to italicize any of the words in the languages that were in the stories, because I feel like those foreign words felt just as important and integral to the story as everything else, so I wanted it all to just exist as its own thing. — Molly Antopol

The wolf had been trained by the man, or had trained himself unassisted, to divers wolfish arts, which swelled the receipts. "Above all things, do not degenerate into a man," his friend would say to him. Never did the wolf bite: the man did now and then. At least, to bite was the intent of Ursus. He was a misanthrope, and to italicize his misanthropy he had made himself a juggler. To live, also; for the stomach has to be consulted. — Victor Hugo