Among the many paradoxes of human life, this is perhaps the most peculiar and consequential: We often behave in ways that are guaranteed to make us unhappy. Many of us spend our lives marching with open eyes toward remorse, regret, guilt, and disappointment. And nowhere do our injuries seem more casually self-inflicted, or the suffering we create more disproportionate to the needs of the moment, than in the lies we tell to other human beings. Lying is the royal road to chaos.