GREG WALTON and CAROL DWECK
When people believe that willpower is fixed and limited, their willpower is easily depleted. But when people believe that willpower is self-renewing — that when you work hard, you’re energized to work more; that when you’ve resisted one temptation, you can better resist the next one — then people successfully exert more willpower. It turns out that willpower is in your head.
Messages suggesting that willpower is severely limited and that we need constant sugar boosts are bound to further inflate the American waistline and hinder our ability to achieve our goals.