My motivation for all my companies has been to be involved in something that I thought would have a significant impact on the world.

Even if producing CO2 was good for the environment, given that we're going to run out of hydrocarbons, we need to find some sustainable means of operating.

I'd like to dial it back 5% or 10% and try to have a vacation that's not just e-mail with a view.

I think that's an important thing to do, to really pay attention to negative feedback, and solicit it, particularly from friends. This may sound like simple advice, but hardly anyone does that, and it's incredibly helpful.

America is the spirit of human exploration distilled.

We need to be super careful with AI. Potentially more dangerous than nukes.

Weighing too much on someone's talent and not someone's personality. I think it matters whether someone has a good heart.