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.

Choose great people and shine in their shadows

Colleagues should take care of each other, have fun, celebrate success, learn by failure, look for reasons to praise not to criticize, communicate freely and respect each other.

Everyone needs something to aim for. You can call it a challenge, or you can call it a goal. It is what makes us human. It was challenges that took us from being cavemen to reaching for the stars.

I'm not superstitious. I don't really believe in star signs, sorry, or superstitions.

Actually, we did a fun April Fools' thing with Google a couple of years ago, which we called Virgle. And we looked for volunteers to go on a one-way trip to Mars.

I also know, as an entrepreneur myself, you face new obstacles every day and you need to have the perseverance to see them through.