If he believed in the full complement of evil in himself, he had to believe also in a natural compulsion to express it. He found himself wondering, therefore, from time to time, if he might have enjoyed his crime in some way, derived some primal satisfaction from it - how else could one really explain in mankind the continued toleration of wars, the perennial enthusiasm for wars when they came, if not for some primal pleasure in killing? - and because the capacity to wonder came so often, he accepted it as true that he had.
— Patricia Highsmith
crime-and-punishment