I would like to die on Mars. Just not on impact.

You want to do things you’re passionate about but also are useful to other people.

Brand is just a perception, and perception will match reality over time. Sometimes it will be ahead, other times it will be behind. But brand is simply a collective impression some have about a product.

I think there are more politicians in favor of electric cars than against. There are still some that are against, and I think the reasoning for that varies depending on the person, but in some cases, they just don't believe in climate change - they think oil will last forever.

Facebook is quite entrenched and has a network effect. It's hard to break into a network once it's formed.

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.

We're running the most dangerous experiment in history right now, which is to see how much carbon dioxide the atmosphere can handle before there is an environmental catastrophe.