Optimism, pessimism, f**k that; we're going to make it happen. As God is my bloody witness, I'm hell-bent on making it work.

Land on Mars, a round-trip ticket - half a million dollars. It can be done.

The fuel cell is just a fundamentally inferior way of delivering electrical energy to an electric motor than batteries.

I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.

I really do encourage other manufacturers to bring electric cars to market. It's a good thing, and they need to bring it to market and keep iterating and improving and make better and better electric cars, and that's what going to result in humanity achieving a sustainable transport future. I wish it was growing faster than it is.

A Prius is not a true hybrid, really. The current Prius is, like, 2 percent electric. It's a gasoline car with slightly better mileage.

If anyone has a vested interest in space solar power, it would have to be me.