Killing "for sport" is the perfect type of that pure evil for which metaphysicians have sometimes sought. Most wicked deeds are done because the doer proposes some good to himself...[but] the killer for sport has no such comprehensible motive. He prefers death to life, darkness to light. He gets nothing except the satisfaction of saying, "Something that wanted to live is dead. There is that much less vitality, consciousness, and, perhaps, joy, in the universe. I am the Spirit that Denies."

- Josep Wood Krutch