Don’t tax my income, tax my consumption.

I think given all the different imperatives - getting energy to Africa, security of energy, climate change, that we should be spending half as much as we spend on health, which will get you all the way up to $15 billion - the health people don't like it when things get compared to their number.

Even when things are stable, that's not easy [to work in Africa] because there are not roads, and the weather is tough, the education system hasn't been there. But this is how you get great countries, is step by step.

It's really kind of cool to have solar panels on your roof.

Software was the key element that would determine how useable and how broadly applicable the machine was.

If we [Microsoft Corporation] weren't still hiring great people and pushing ahead at full speed, it would be easy to fall behind and become a mediocre company. Fear should guide you, but it should be latent. I have some latent fear. I consider failure on a regular basis.

I'm a big believer that as much as possible, and there's obviously political limitations, freedom of migration is a good thing.