"The idea of lying on a beach as my main thing just sounds like the worst. It sounds horrible to me."

"If humanity is to become multi-planetary, the fundamental breakthrough that needs to occur in rocketry is a rapidly and completely reusable rocket."

"Patience is a virtue, and I'm learning patience. It's a tough lesson."

"I always invest my own money in the companies that I create. I don't believe in just using other people's money."

"I don't believe in process. In fact, when I interview a potential employee and they say that 'it's all about the process,' I see that as a bad sign."

"My biggest mistake is probably weighing too much on someone's talent and not someone's personality. It actually matters whether somebody has a good heart."

"I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better."

"An asteroid or a supervolcano could certainly destroy us... we also face risks the dinosaurs never saw."

"Optimism, pessimism, f*** that; we’re going to make it happen."

"If you need inspiring words, don't do it."

"Physics is the only real law. Everything else is a recommendation."

"A company is a group of people organized to create a product or service."

"You get paid in direct proportion to the difficulty of problems you solve."

"If you're co-founder or CEO, you have to do all the tasks you might not want to do."

"People work better when they know what the goal is and why."