One thing I've always loved about the culture at Microsoft is there is nobody who is tougher on us, in terms of what we need to learn and do better, than the people in the company itself. You can walk down these halls, and they'll tell you, 'We need to do usability better, push this or that frontier.'

Almost every way we make electricity today, except for the emerging renewables and nuclear, puts out CO2. And so, what we're going to have to do at a global scale, is create a new system. And so, we need energy miracles.

You need to understand things in order to invent beyond them.

Digital technology has several features that can make it much easier for teachers to pay special attention to all their students.

Exposure from a young age to the realities of the world is a super-big thing.

We believe unbelievable progress can be made, in both inventing new vaccines and making sure they get out to all the children who need them.

I've said some stupid things and some wrong things, but not that. No one involved in computers would ever say that a certain amount of memory is enough for all time.