You could not legally put a human and fly them into space. In fact, you couldn't bring a spaceship back. All those spaceships we were sending commercially into space were one way. You sort of like, got rid of them. And most passengers, who go up, do want to come back down.

Life on Earth is at an ever-increasing risk of being wiped out by disaster. ... I think the human race doesn't have a future if it doesn't go into space. I therefore want to encourage public interest in space.

An expert is someone who can tell you exactly how it can't be done.

It's sad that the U.S. government doesn't fund risky research anymore.

Eight billion people will have Internet access by 2020.

Today, philanthropy is a very unsophisticated, old world process where people who make a shitload of money go and give it away and when they're making their money, they're focused on 10x, 100x returns on the dollar.

What is grit? Grit is refusing to give up. It's persistence. It's making your own luck.