I considered law and math. My Dad was a lawyer. I think though I would have ended up in physics if I didn't end up in computer science.

As I see it, there are two great forces of human nature: self-interest, and caring for others. Capitalism harnesses self-interest in a helpful and sustainable way, but only on behalf of those who can pay. Government aid and philanthropy channel our caring for those who can't pay. But to provide rapid improvement for the poor we need a system that draws in innovators and businesses in a far better way than we do today.

The next time someone tells you we can trim the budget by cutting aid, I hope you will ask whether it will come at the cost of more people dying.

Instead of buying airplanes and playing around like some of our competitors, we've rolled almost everything back to the company.

I meet people overseas that know five languages - that the only language I'm comfortable in is English.

By improving health, empowering women, population growth comes down.

It's OK for China to invent cancer drugs that cure patients in the United States. We want them to catch up. But as the leader, we want to keep setting a very, very high standard. We don't want them to catch up because we're slowing down or, even worse, going into reverse.