I was announcing to the public, in 2006, that I'd be leaving Microsoft in a couple of years and focusing full-time on the foundation. That was the time at which we went back to New York and Warren [Buffett] announced these gifts to a number of foundations, with a very high percentage of it going to us and basically doubling our capacity.

The close relationships we form between researchers and product groups have already shown we can move the great ideas as they come along, without a schedule, into the products.

In fact, batteries haven't improved over the last 100 years as much as they would need to in order to make that happen. So I'm invested in a lot of battery companies - and there's a lot that exists I'm not in. They're all having a tough time achieving it.

What I do best is share my enthusiasm.

One of the statistics that always amazes me is the approval of the Chinese government, not elected, is over 80 percent. The approval of the U.S. government, fully elected, is 19 percent. Well, we elected these people and they didn't elect those people. Isn't it supposed to be different? Aren't we supposed to like the people that we elected?

America's high schools are obsolete. By obsolete, I don't just mean that they're broken, flawed, or underfunded, though a case could be made for every one of those points. By obsolete, I mean our high schools-even when they're working as designed-cannot teach all our students what they need to know today.

When you lose a customer, it can be tempting to tell each other, "That customer's not very sharp. They just made the wrong decision".