I never wanted to be a businessman, I just wanted to change the world

Fun is one of the most important - and underrated - ingredients in any successful venture. If you're not having fun, then it's probably time to call it quits and try something else.

There is no greater thing you can do with your life and your work than follow your passions – in a way that serves the world and you.

Space is hard - but worth it. We will persevere and move forward together.

We've definitely cracked the technology. Now we're just trying to be able to produce the amount of fuels that we need to satisfy our own needs and then other people's needs.

We should all seek to innovate, or be curious about innovation. Innovation truly is one of our greatest gifts.

I don’t think of work as work and play as play. It’s all living.