If we drive down the cost of transportation in space, we can do great things.

Don't be afraid of new arenas.

Selling an electric sports car creates an opportunity to fundamentally change the way America drives.

Self-driving cars are the natural extension of active safety and obviously something we should do.

If anyone thinks they'd rather be in a different part of history, they're probably not a very good student of history. Life sucked in the old days. People knew very little, and you were likely to die at a young age of some horrible disease. You'd probably have no teeth by now. It would be particularly awful if you were a woman.

In order to have your voice be heard in Washington, you have to make some little contribution.

The extension of life beyond Earth is the most important thing we can do as a species.