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

I think the high-tech industry is used to developing new things very quickly. It's the Silicon Valley way of doing business: You either move very quickly and you work hard to improve your product technology, or you get destroyed by some other company.

You could warm Mars up, over time, with greenhouse gases.

The thing that's worth doing is trying to improve our understanding of the world and gain a better appreciation of the universe and not to worry too much about there being no meaning. And, you know, try and enjoy yourself. Because, actually, life's pretty good. It really is.

I’m nauseatingly pro-American. I would have come here from any country. The U.S. is where great things are possible.

Any product that needs a manual to work is broken.

When Henry Ford made cheap, reliable cars people said, 'Nah, what's wrong with a horse?' That was a huge bet he made, and it worked.