Individuals somehow are led to find my books at times that are important to them. The mail that I get very, very often will say, "I was at a difficult time in my life, and someone gave me a copy."

Don't turn away from possible futures before you're certain you don't have anything to learn from them.

If we want to end this lifetime higher than we began, we can expect an uphill road.

A tiny change today brings a dramatically different tomorrow.

The world is your exercise book, the pages on which you do your sums. It is not reality, though you may express reality there if you wish. You are also free to write lies, or nonsense, or to tear the pages.

There's so much to learn! And just when we think, "I've got it. I really understand what's going on," we're shown a whole new stage set on which to play.

When you're flying, an airplane doesn't care who you are; it doesn't care how much money you make or don't make. All it cares about is: How well do you fly? How well do you know the airplane? How well do you know the sky?