Who said “As there is a use in medicine for poisons, so the world cannot move without rogues.”?

“I have known a vast quantity of nonsense talked about bad men not looking you in the face. Don't trust that conventional idea. Dishonesty will stare honesty out of countenance any day in the week, if there is anything to be got by it.”

“When it comes to the point, really bad men are just as rare as really good ones.”

“Gamesters and highwaymen are generally very good to their whores, but they are very devils to their wives.”

“As for an authentic villain, the real thing, the absolute, the artist, one rarely meets him even once in a lifetime. The ordinary bad hat is always in part a decent fellow.”

“In the old days villains had moustaches and kicked the dog. Audiences are smarter today. They don't want their villain to be thrown at them with green limelight on his face. They want an ordinary human being with failings.”

“A man is a god in ruins.”

“Money often costs too much.”

“We boil at different degrees.”

“Whatever limits us we call fate.”

“Every hero becomes a bore at last.”

“Every artist was first an amateur.”