" They are. But in Special Circumstances we deal in the moral equivalent of black holes, where the normal laws — the rules of right and wrong that people imagine apply everywhere else in the universe — break down; beyond those metaphysical event horizons, there exist . . . special circumstances.” She smiled. “That’s us. That’s our territory; our domain.” “To some people,” he said, “that might sound like just a good excuse for bad behavior. "

― Iain M. Banks , Use of Weapons (Culture, #3)