Humor is not an unconditional virtue; its moral character depends on its object. To laugh at the contemptible, is a virtue; to laugh at the good, is a hideous vice. Too often, humor is used as the camouflage of moral cowardice.
The Ayn Rand Lexicon: Objectivism from A to Z (ed. Penguin, 1988) - ISBN: 9781101137246