“I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.”

“It's not as though we can keep burning coal in our power plants. Coal is a finite resource, too. We must find alternatives, and it's a better idea to find alternatives sooner then wait until we run out of coal, and in the meantime, put God knows how many trillions of tons of CO2 that used to be buried underground into the atmosphere.”

“Great companies are built on great products.”

“I had so many people try to talk me out of starting a rocket company, it was crazy.”

“I've been to Disneyland, like, 10 times. I'm getting really tired of Disneyland.”

“Five great enemies of peace inhabit us: avarice, ambition, envy, anger and pride.”

“The core of the seen and unseen universe smiles, but remember smiles come best from those who weep. Lightning, then the rain-laughter.”

“When your love contracts in anger, the atmosphere itself feels threatening. But when you’re expansive, no matter what the weather, you’re in an open, windy field with friends.”