"Schizophrenics aren't clever or wise or witty — they may make some very odd remarks but that's because they're mad, and there's nothing to be got out of what they say. When they laugh at things the rest of us don't think are funny, like the death of a parent, they're not being penetrating, and on other occasions they're not wryly amused at the simplicity and stupidity of the psychiatrist, however well justified that might be in many cases. They're laughing because they're mad, too mad to be able to tell what's funny any more.The rewards for being sane may not be very many but knowing what's funny is one of them."