That's my lesson for taking a vacation: vacation will kill you.

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

You want to have a future where you’re expecting things to be better, not one where you’re expecting things to be worse.

With artificial intelligence we are summoning the demon.

If you get up in the morning and think the future is going to be better, it is a bright day. Otherwise, it’s not.

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.

It's a fixer-upper of a planet but we could make it work.