Most of the choices we make each day may feel like the products of well-considered decision making, but they’re not. They’re habits.

There's a natural instinct embedded in friendship, a sympathy that makes us willing to fight for someone we like when they are treated unjustly.

Rather, to change a habit, you must keep the old cue, and deliver the old reward, but insert a new routine.

Companies aren’t families. They’re battlefields in a civil war.

This is the real power of habit: the insight that your habits are what you choose them to be.

At some point, if you're changing a really deep-seated behavior, you're going to have a moment of weakness.

For a habit to stay changed, people must believe change is possible.