Two heads are definitely better than one and by sourcing ideas from each other, you have a better chance of coming up with a strategy that will allow your business to overcome a setback or challenge.

I have always looked on my businesses not just as money-making machines, but as adventures that can, I hope, make people better off.

Respect is how to treat everyone, not just those you want to impress.

Purpose is not an add-on, it’s not an initiative. It is a culture change and it never finishes

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.

Look, if you can indulge in your passion, life will be far more interesting than if you're just working. You'll work harder at it, and you'll know more about it. But first you must go out and educate yourself on whatever it is that you've decided to do - know more about kite-surfing than anyone else. That's where the work comes in. But if you're doing things you're passionate about, that will come naturally.

I felt uneasy about making the rapid decisions I have always made, and wondered whether every decision should be formally ratified and minuted at a board meeting.