With artificial intelligence, we are summoning the demon. In all those stories where there's the guy with the pentagram and the holy water, it's like, yeah, he's sure he can control the demon. Didn't work out.

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

That's my lesson for taking a vacation: vacation will kill you.

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?'

The tough thing is figuring out what questions to ask, but […] once you do that, the rest is really easy.

I wouldn't say I have a lack of fear. In fact, I'd like my fear emotion to be less because it's very distracting and fries my nervous system.

You want to have a future where you’re expecting things to be better, not one where you’re expecting things to be worse.