If someone is always to blame, if every time something goes wrong someone has to be punished, people quickly stop taking risks. Without risks, there can't be breakthroughs.

The folks who go after grand challenges are impatient. They're pissed off. They're sick and tired, but in a passionate way. They're driven by a fire in their bellies to make a difference.

If you stop and you think about everything we hold of value on this planet, metal, minerals, energy, real estate, the things that nations fight wars over. These things are in near infinite quantities out there.

The idea of a young thin woman who weighs 100 pounds driving herself around in a 4,000 pound SUV is laughable.

If someone is always to blame, if every time something goes wrong someone has to be punished, people quickly stop taking risks. Without risks, there can't be breakthroughs.

An expert is someone who can tell you exactly how it can't be done.

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