People should pursue what they're passionate about. That will make them happier than pretty much anything else.

Biofuels such as ethanol require enormous amounts of cropland and end up displacing either food crops or natural wilderness, neither of which is good.

When I was in college, I wanted to be involved in things that would change the world.

As a child I would just question things.

Obviously Tesla is about helping solve the consumption of energy in a sustainable manner but you need the production of energy in a sustainable manner.

Going from PayPal, I thought: 'Well, what are some of the other problems that are likely to most affect the future of humanity?' Not from the perspective, 'What's the best way to make money?'

There's a real opportunity to have a vertical takeoff and landing electric supersonic jet.