There are some important differences between me and Tony Stark, like I have five kids, so I spend more time going to Disneyland than parties.

The revolutionary breakthrough will come with rockets that are fully and rapidly reusable. We will never conquer Mars unless we do that. It'll be too expensive. The American colonies would never have been pioneered if the ships that crossed the ocean hadn't been reusable.

When I was in college, I wanted to be involved in things that would change the world.

When something is important enough, you do it even if the odds are not in your favor.

I always invest my own money in the companies that I create. I don't believe in the whole thing of just using other people's money. I don't think that's right. I'm not going to ask other people to invest in something if I'm not prepared to do so myself.

Don’t just follow the trend. You may have heard me say that it’s good to think in terms of the physics approach of first principles. Which is, rather than reasoning by analogy, you boil things down to the most fundamental truths you can imagine and you reason up from there.

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