The Willpower Instinct: How Self-Control Works, Why It Matters, and What You Can Do To Get More of It

by Kelly McGonigal

unlike the saber-toothed tiger, the cheesecake is not the real threat. Think about it: That cheesecake cannot do anything to you, your health, or your waistline unless you pick up the fork. That’s right: This time, the enemy is within.