It's nice to be happy. But the meaning of life is meaning - what's the impact you're having on the world. Suffering to accomplish that is a perfectly fine thing.

I don't normally think of like most successful moments, because like most entrepreneurs, I tend to think that however how high of a mountain I've climbed, I'm always looking at the next mountain to climb.

When you turn a company profitable you've gone from a company whose days are numbered to a company whose days can be infinite.

Pay attention to your culture and your hires from the very beginning.

The metaphor that I frequently use for entrepreneurship is jumping off a cliff and assembling an airplane plane on the way down.

What is an entrepreneur? Someone who jumps off a cliff and builds a plane on the way down.

We have made a huge amount of progress over the last 50 years by enabling trade, by enabling kind of collaboration and learning. And actually, in fact, when you look at your average 30-year-old today, they're much better off than a 30-year-old 20 years ago, 30 years ago, because of progress in technology and health care and all the rest of this.