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

If you think back to the beginning of cell phones, laptops or really any new technology, it's always expensive.

So, there's quite a big keep-out zone, and when you factor the keep-out zone into account, the solar panels put on that area would typically generate more power than that nuclear power plant.

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

To our knowledge, life exists on only one planet, Earth. If something bad happens, it's gone. I think we should establish life on another planet-Mars in particular-but we 're not making very good progress. SpaceX is intended to make that happen.

If you're trying to create a company, it's like baking a cake. You have to have all the ingredients in the right proportion.

Actively seek out and listen carefully to negative feedback.