I believe that every life is valuable. That we can make things better. That innovation is the key to a bright future. That we're just getting started.

The AIDS is a disease that is hard to talk about.

So we do software for watches, for phones, for TV sets, for cars. And some of these take a long time to catch on.

The most impactful dollars that Australia can spend are actually what goes to help the poorest.

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.

I'm going to save my public voice largely for the issues where I have some depth.

I don't think there is any philosophy that suggests having polio is a good thing.