Physics is really figuring out how to discover new things that are counterintuitive, like quantum mechanics. It's really counterintuitive.

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.

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 tend to approach things from a physics framework. And physics teaches you to reason from first principles rather than by analogy.

Tesla is here to stay and keep fighting for the electric car revolution.

Yeah, well I think anyone who likes fast cars will love the Tesla. And it has fantastic handling by the way. I mean this car will crush a Porsche on the track, just crush it. So if you like fast cars, you'll love this car. And then oh, by the way, it happens to be electric and it's twice the efficiency of a Prius.

I'm glad to see that BMW is bringing an electric car to market. That's cool.