The quality of a leader cannot be judged by the answers he gives, but by the questions he asks.

Work requires effort. Things we love to do feel effortless. Only do the things you love and you'll never have to work again.

Too many people write books because they want to be a New York Times best-seller. They want the glory and the fame.

Great leaders don't blame the tools they are given. Great leaders work to sharpen them.

Simple ideas are easier to understand. Ideas that are easier to understand are repeated. Ideas that are repeated change the world.

If you go to the gym and you come home and look into the mirror, you'll see nothing. If you go the next day and you come home, you will see nothing. In fact sometimes you're in pain.

Any great and inspiring leader or organization that ever existed set out to do something completely unrealistic.