"You do not rise to the level of your goals. You fall to the level of your systems."

Section: 1, Chapter: 1

"True behavior change is identity change. You might start a habit because of motivation, but the only reason you’ll stick with one is that it becomes part of your identity."

Section: 1, Chapter: 2

"Habits are a dopamine-driven feedback loop. When dopamine rises, so does our motivation to act."

Section: 3, Chapter: 8

"What is immediately rewarded is repeated. What is immediately punished is avoided."

Section: 5, Chapter: 15

"Professionals stick to the schedule; amateurs let life get in the way."

Section: 6, Chapter: 19