Land on Mars, a round-trip ticket - half a million dollars. It can be done.

It is despairing to consider that the cost and reliability of access to space have barely changed since the Apollo era over three decades ago. Yet in virtually every other field of technology, we have made great strides in reducing cost and increasing capability.

I always had an existential crisis, trying to figure out ‘what does it all mean?’ I came to the conclusion that if we can advance the knowledge of the world, if we can expand the scope and scale of consciousness, then, we’re better able to ask the right questions and become more enlightened. That’s the only way to move forward.

I'm extremely confident that solar will be at least a plurality of power, and most likely a majority... in less than 20 years.

Weighing too much on someone's talent and not someone's personality. I think it matters whether someone has a good heart.

Physics is really figuring out how to discover new things that are counterintuitive, like quantum mechanics. It's really counterintuitive.

I read books and talked to people. I mean that's kind of how one learns anything. There's lots of great books out there & lots of smart people.