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

Selling an electric sports car creates an opportunity to fundamentally change the way America drives.

It was obvious to me that we could never colonize Mars without reusability, any more than America would have been colonized if they had to burn the ships after every trip.

Any product that needs a manual to work is broken.

I always see what’s... wrong. Would you want that? When I see a car or a rocket or spacecraft, I only see what’s wrong. I never see what’s right. It’s not a recipe for happiness.

Going from PayPal, I thought: 'Well, what are some of the other problems that are likely to most affect the future of humanity?' Not from the perspective, 'What's the best way to make money?'

I do love email. Wherever possible I try to communicate asynchronously. I'm really good at email.