All lives have equal value. And so you say, 'why do poor children die when other children don't? Why do some people have enough nutrition or reasonable toilets and other people don't?' So those basic needs that, through innovation, actually it's very affordable to bring them...to everyone.

In most of these things our foundation is a co-funder, so I can say that a polio or an HIV vaccine, that I'm putting our resources behind it in a very big way and the U.S. government would be the best partner for those efforts.

Expectations are a form of first-class truth: If people believe it, it's true.

Robots will play an important role in providing physical assistance and even companionship for the elderly.

I'm going to retain a lot of Microsoft's stock.

Unemployment rates among Americans who never went to college are about double that of those who have a postsecondary education.

Success is a miserable teacher. It tempts intelligent people to believe they cannot lose. And it is an unreliable guide to the future.