As people strengthened their willpower muscles in one part of their livesโin the gym, or a money management programโthat strength spilled over into what they ate or how hard they worked. Once willpower became stronger, it touched everything.
Charles DuhiggThe problem is that your brain can't tell the difference between bad and good habits, and so if you have a bad one, it's always lurking there, waiting for the right cues and rewards.
Charles DuhiggCravings are what drive habits. And figuring out how to spark a craving makes creating a new habit easier.
Charles DuhiggHowever, to modify a habit, you must decide to change it. You must consiously accept the hard work of identifying the cues and rewards that drive the habits' routines, and find alternatives. You must know you have control and be self-conscious enough to use it -- and every chapter in this book is devoted to illustrating a different aspect of why that control is real.
Charles Duhigg