Even what we call our material desires are spiritual, because they are human. Science can analyse a pork-chop, and say how much of it is phosphorus and how much is protein; but science cannot analyse any man's wish for a pork-chop, and say how much of it is hunger, how much custom, how much nervous fancy, how much a haunting love of the beautiful. The man's desire for the pork-chop remains literally as mystical and ethereal as his desire for heaven.
