Today, we're very dependent on cheap energy. We just take it for granted - all the things you have in the house, the way industry works.

So it's an absolute lie that has killed thousands of kids. Because the mothers who heard that lie, many of them didn't have their kids take either pertussis or measles vaccine, and their children are dead today. And so the people who go and engage in those anti-vaccine efforts -- you know, they, they kill children. It's a very sad thing, because these vaccines are important.

I believe technology will continue to become more affordable and more people will have the chance to use it. This will help more people get medical care and a good education.

Don't let complexity stop you. Be activists. Take on the big inequities. It will be one of the great experiences of your lives.

There is this broad, broad recognition of how technology is enabling new things. Companies that never paid attention to computers in any form now see digital technology as creating threats and opportunities for them.

When you are failing, you are forced to be creative, to dig deep and think, night and day.

I believe innovation is the most powerful force for change in the world.