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

I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.

Even if producing CO2 was good for the environment, given that we're going to run out of hydrocarbons, we need to find some sustainable means of operating.

If you go back back a few hundred years, what we take for granted today would seem like magic - being able to talk to people over long distances, to transmit images, flying, accessing vast amounts of data like an oracle. These are all things that would have been considered magic a few hundred years ago.

And we need things in life that are exciting and inspiring. It can't just be about solving some awful problem. There have to be reasons to get up in the morning.

Weighing too much on someone's talent and not someone's personality. I think it matters whether someone has a good heart.

I don't think it's a good idea to plan to sell a company.