In almost any industry, if you're passionate about doing a great job and making people that buy your product or service as happy as possible, it's really fulfilling.

In the case of Apple, they did originally do production internally, but then along came unbelievably good outsourced manufacturing from companies like Foxconn. We don't have that in the rocket business. There's no Foxconn in the rocket business.

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

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

Does the logic connect? What are the range of probably outcomes? You want to figure out what those probabilities are and ideally be the House. It's fine to gamble, as long as you're the House. Also, listen to critical feedback, particularly from friends. Generally they will be thinking it but they won't tell you.

Mars is the only place in the solar system where it's possible for life to become multi-planetarian.

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