" People stopped knowing how to behave, and most of all they stopped remembering why . They needed reasons to toe the line, and that was what they were given. Two reasons. Heaven, and Hell. Equal in resonance and moment. No one will ever be able to tell whether it has been the promise of Heaven or the threat of Hell that has kept this world from teetering into chaos ten thousand times. That is why Hell matters, and that's why the power of black deeds must always be directed there. Without evil there is no good, and without Hell's focusing lens there can be no true evil - just a great deal of extremely poor behaviour. "

― Michael Marshall Smith , Hannah Green and Her Unfeasibly Mundane Existence