I have learnt more from my failures than my successes.

If you have an idea that's going to make a big difference to people's lives, and other people are not doing it, you know, just say "screw it," do it and get on with it, and give it a go.

To have created one of the most respected companies in the world. Not necessarily the biggest.

The bigger the dream, the greater the opportunity

And [we hope to sell] the clean fuels to other airlines. I mean, the exciting thing about the breakthrough with clean fuels for the airline industry is there's only 1,700 pumps in the world that fill up the airlines.

The best advice I ever received? Simple: Have no regrets.

The quality of business communications has become poorer in recent years as people avoid phone calls and face-to-face meetings, I can only assume, in some misguided quest for efficiency.