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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.

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Some people don't like change, but you need to embrace change if the alternative is disaster.

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If something's important enough, you should try. Even if you - the probable outcome is failure.

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We could definitely make a flying car - but that's not the hard part. The hard part is, how do you make a flying car that's super safe and quiet? Beca...more

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When something is important enough, you do it even if the odds are not in your favor.

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I think it matters whether someone has a good heart.

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It's OK to have your eggs in one basket as long as you control what happens to that basket.

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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 v...more

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Yeah, well I think anyone who likes fast cars will love the Tesla. And it has fantastic handling by the way. I mean this car will crush a Porsche on t...more

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Over time I think we will probably see a closer merger of biological intelligence and digital intelligence.

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

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You need to be in the position where it is the cost of the fuel that actually matters and not the cost of building the rocket in the first place.

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My vision is for a fully reusable rocket transport system between Earth and Mars that is able to re-fuel on Mars - this is very important - so you don...more

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It's obviously tricky to convert cellulose to a useful biofuel. I think actually the most efficient way to use cellulose is to burn it in a co-generat...more

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There's a silly notion that failure's not an option at NASA. Failure is an option here. If things are not failing, you are not innovating enough.