When we have a clear sense of our destination, we can be flexible in the route we take to reach it.

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

Too many people write books as a calling card.

I'm building on purpose. I'm building that tipping point. I'm building that law of diffusion of innovation.

Follow those who follow something bigger than themselves - an idea, a belief, a vision, a cause. Run away from those who say we need to follow them.

If you're looking for a New York Times best-seller, I may or may not give you that.

We pursue exercise even though empirically we see no benefit from the energy we're spending and we're hurting. So empirically we should quit. The why is exactly the same thing. You persist even though there are some short-term stresses and even though there is some uncertainty.