Ninety percent of the cases of polio are in security-vulnerable areas.

As you improve health in a society, population growth goes down. You know, I thought it was... before I learned about it, I thought it was paradoxical.

Learn from your unhappy customers.

It is hard to smash a computer when you're laughing.

I am surprised that in various countries, whether it's the U.K. or the U.S., you see isolationist tendencies that would tend to work against the co-operation, whether it's climate change, immigration, innovation, helping the very poorest. Those are things where you want to think across country boundaries and see a win-win-type solution.

The CEO's role in raising a company's corporate IQ is to establish an atmosphere that promotes knowledge sharing and collaboration.

The outside perception and inside perception of Microsoft are so different. The view of Microsoft inside Microsoft is always kind of an underdog thing.