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

Fear is a hard thing to deal with. I feel it quite strongly. If I think something is important enough, I'll make myself do it in spite of fear. But it can really sap the will. I hate fear, I wish I had it less.

Winning 'Motor Trend' Car of the year is probably the closest thing to winning the Oscar or Emmy of the car industry.

If you had to buy a new plane every time you flew somewhere, it would be incredibly expensive.

If you're trying to create a company, it's like baking a cake. You have to have all the ingredients in the right proportion.

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.

I feel very strongly that SpaceX would not have been able to get started, nor would we have made the progress that we have, without the help of NASA.