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

The world's biggest problems are the world's biggest business opportunities.

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 first trillionaire can be made in space.

Many have built their careers buttressing the status quo, reinforcing what theyve already accomplished, and resisting the radical thinking that can topple their legacy - not exactly the attitude you want when trying to drive innovation forward.

Super-ambitious goals tend to be unifying and energizing to people; but only if they believe there's a chance of success.

We live in a world bathed in 5,000 times more energy than we consume as a species in the year, in the form of solar energy.