Leaders are those who empower others.

The tool that's most associated with the recent progress against malaria is the long-lasting bed net. Bed nets are a fantastic innovation. But we can do even better. We can invent new ways to control the mosquitoes that carry the malaria parasite.

The world is very disparate, in terms of the US using the most energy per person, and then the other rich countries - Europe, Japan, New Zealand - using about half of what we do, and then the world average being about a fifth of what we use, with China just now surpassing the world average.

Software innovation, like almost every other kind of innovation, requires the ability to collaborate and share ideas with other people, and to sit down and talk with customers and get their feedback and understand their needs.

The early personal computers were not very powerful so the idea of feeding their program into a small amount of memory requires immense skill.

I'm certainly well taken care of in terms of food and clothes.

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.