And in the process, we have come up with fuels - algae-based fuels, isobutanol-based fuels and other fuels - that we think will power the planes in the future so that, you know, by 2020 I hope that our planes will be powered on fuels that are clean fuels and are not polluting the environment so that we'll have a green airline and an airline that actually has fuels that will be hopefully cheaper than the dirty fuels of the past. So [we're] doing good and also turning a profit at the same time.

It always pays off to focus on things that will make you feel proud. Remember this during every difficult decision you face.

Space travel will be like every other business. There will be competitors. . . . Thirty months from now, I'm confident we'll be flying people into space.

The entrepreneurs who succeed usually want to make a difference to people’s lives, not just their own bank balances.

So I've seen life as one long learning process. And if I see - you know, if I fly on somebody else's airline and find the experience is not a pleasant one, which it wasn't in - 21 years ago, then I'd think, well, you know, maybe I can create the kind of airline that I'd like to fly on.

If young people do see me as an example (I'm very flattered if they do!) I hope it is as someone who will go out there and live life to the full.

Fantasizing about the future is one of my favorite pastimes.