" Fear might stop some people from committing murder, but he knew for certain fear was what drove most people to kill. It was what nested below all the other emotions. It was what twisted and turned the other emotions into something sick. It was an alchemist and could turn daylight into night, joy into despair. Fear, once taken root, blocked the sun. And Gamache knew what grew in that darkness. He searched for it every day. "

― Louise Penny , The Cruelest Month (Chief Inspector Armand Gamache, #3)