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

I'm interested in things that change the world or that affect the future and wondrous, new technology where you see it, and you're like, 'Wow, how did that even happen? How is that possible?

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

Stop being patient and start asking yourself, how do I accomplish my 10-year plan in 6 months? You will probably fail but you will be a lot further ahead of the person who simply accepted it was going to take 10 years.

Boeing just took $20 billion and 10 years to improve the efficiency of their planes by 10 percent. That's pretty lame. I have a design in mind for a vertical liftoff supersonic jet that would be a really big improvement.

I really don't have any other motivation for personally accumulating assets except to be able to make the biggest contribution I can to making life multiplanetary.