There are millions of people out there who would love to become astronauts, who'd love to go to space - they'd love to look back at this wonderful world from space. That will be the engine that will enable us then to develop spaceships to transport people around the world at tremendous speeds in an environmentally friendly way.

Play fair, be prepared for others to play dirty, and don't let them drag you into the mud.

We're going where no one has gone before. There's no model to follow, nothing to copy. That is what makes this so exciting.

We should all seek to innovate, or be curious about innovation. Innovation truly is one of our greatest gifts.

People do not mind people who try things and fail. If you're a good entrepreneur, you're not going to succeed in every single thing you try. You've got to try to succeed at more things than fail.

Engage your emotions at work. Your instincts and emotions are there to help you.

I may be a businessman in that I set up and run companies for profit, but when I try to plan ahead and dream up new products and new companies, I'm an idealist.