"Suppose, gentlemen, that man is not stupid. (Really, it is quite impossible to say he is, for the sole reason that if he is stupid, who then is intelligent?) But even if he isn’t stupid, all the same he’s monstrously ungrateful! Phenomenally ungrateful. I even think the best definition of man is: a being that goes on two legs and is ungrateful."

— Dostoevsky, Notes From Underground