Space is not a two-year objective. It used to be, in the early '60's, we had this eye candy of Mercury and Gemini and Apollo and every year we would do something more and more and it met those needs. But the easy stuff has been done.

The question companies have to ask, or governments have to ask is, where do we allow crazy ideas to bubble up? Because if there is a failure, what happens? Someone gets blame. There's a lawsuit, there's a congressional investigation. And so, those things shut down the creative engine.

We are racing toward a world of abundance, and we are going to be increasing the quality of life for everyone on this planet. The world's biggest problems are the world's biggest business opportunities.

The best way to become a billionaire is to help a billion people.

Every second of every day, our senses bring in way too much data than we can possibly process in our brains.

My father, who grew up picking olives on the Greek island of Lesbos, was a doctor. So my family expected me to become a physician.

The day before something is a breakthrough, it’s a crazy idea.