“This is how feedback ultimately triggers desirable behavior. Once we deconstruct feedback into its four stages of evidence, relevance, consequence, and action, the world never looks the same again. Suddenly we understand that our good behavior is not random. It’s logical. It follows a pattern. It makes sense. It’s within our control. It’s something we can repeat. It’s why some obese people finally—and instantly—take charge of their eating habits when they’re told that they have diabetes and will die or go blind or lose a limb if they don’t make a serious lifestyle change. Death, blindness, and amputation are consequences we understand and can’t brush aside.”