You have to be pretty driven to make it happen. Otherwise, you will just make yourself miserable.

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

You shouldn't do things differently just because they're different. They need to be... better.

Physics is a good framework for thinking. ... Boil things down to their fundamental truths and reason up from there.

I realized that a methane-oxygen rocket engine could achieve a specific impulse greater than 380.

It is a mistake to hire huge numbers of people to get a complicated job done. Numbers will never compensate for talent in getting the right answer (two people who don't know something are no better than one), will tend to slow down progress, and will make the task incredibly expensive.

Nobody wants to buy a $60,000 electric Civic. But people will pay $90,000 for an electric sports car.