" When you tell people your goal—to lose twenty-five pounds, to run a marathon—you will typically receive praise and congratulations. Way to go! But this tricks you into thinking you have achieved something already, as if the act of telling people has fulfilled your duties. This has the adverse effect of reducing your willpower and self-discipline. People who tell others of their goal lose their drive and are less likely to achieve it. "

― Peter Hollins , The Science of Self-Discipline: The Willpower, Mental Toughness, and Self-Control to Resist Temptation and Achieve Your Goals