There's nothing - I've bought everything I want. I don't like yachts or anything; you know, I'm not a yacht person, and I've got pretty much the nicest plane I'd want to have.

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

If you had to buy a new plane every time you flew somewhere, it would be incredibly expensive.

I think we are at the dawn of a new era in commercial space exploration.

Being an entrepreneur is like eating glass and staring into the abyss of death.

Silicon Valley has evolved a critical mass of engineers and venture capitalists and all the support structure - the law firms, the real estate, all that - that are all actually geared toward being accepting of startups.