I don't spend my time pontificating about high-concept things; I spend my time solving engineering and manufacturing problems.

I'm reasonably optimistic about the future, especially the future of the United States - for the century, at least.

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

I think you should always be seeking negative feedback.

You could power the entire United States with about 150 to 200 square kilometers of solar panels, the entire United States. Take a corner of Utah... there's not much going on there, I've been there. There's not even radio stations.

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.

Some people don't like change, but you need to embrace change if the alternative is disaster.