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

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.

There have only been about a half dozen genuinely important events in the four-billion-year saga of life on Earth: single-celled life, multicelled life, differentiation into plants and animals, movement of animals from water to land, and the advent of mammals and consciousness.

As you heat the planet up, it's just like boiling a pot.

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.

Land on Mars, a round-trip ticket - half a million dollars. It can be done.

I think Tesla will most likely develop its own autopilot system for the car, as I think it should be camera-based, not Lidar-based. However, it is also possible that we do something jointly with Google.