You want to do things you’re passionate about but also are useful to other people.

My background educationally is physics and economics, and I grew up in sort of an engineering environment - my father is an electromechanical engineer. And so there were lots of engineery things around me.

Starting and growing a business is as much about the innovation, drive and determination of the people who do it as it is about the product they sell.

We have a strict 'no a-hole policy' at SpaceX. And we fire people they are. I mean, we give them a little bit of warning. But if they continue to be an a-hole, then they're fired.

I'm extremely confident that solar will be at least a plurality of power, and most likely a majority... in less than 20 years.

So, there's quite a big keep-out zone, and when you factor the keep-out zone into account, the solar panels put on that area would typically generate more power than that nuclear power plant.

Life is too short for long-term grudges.