Have you ever noticed that you’re more likely to be short tempered when hungry, or tired, or just simply the longer the day goes on?
“By making people use a little bit of willpower to ignore cookies, we had a put them into a state where they were willing to quit much faster,” Muraven told me. “There’s been more than two hundred studies on this idea since then, and they’ve all found the same thing. Willpower isn’t just a skill. It’s a muscle, like the muscles in your arms or legs, and it gets tired as it works harder, so there’s less power left over after for other things.” -Charles Duhigg (pg.137)