Every three years, we have to go to the governments and say, okay, you know you're saving millions of lives and even though your budgets are tight, helping Africa avoid this disaster really is a priority.

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.

If I hadn't given my money away, I'd have had more than anyone else on the planet.

The most amazing philanthropists are people who are actually making a significant sacrifice.

We need to start thinking about the future of food if we are going to feed 9 billion people in a way that does not destroy our environment.

Whether you believe it a moral imperative or in the rich world's enlightened self-interest, securing the conditions that will lead to a healthy, prosperous future for everyone is a goal I believe we all share.

Anything you do, you better enjoy it for its value. Because people are going to second-guess everything you do.