We're in a period of uncertainty about [Donald Trump] administration policies and the range of what might happen is particularly higher. I don't think that these R&D and innovation budgets will be substantially reduced.

We believe the world changes when the boldest thinking is directed at the toughest problems

The misconception that aid falls straight into the hands of dictators largely stems from the Cold War era.

I have been struck again and again by how important measurement is to improving the human condition.

[Melinda Gates] is a lot of fun to work with. There's some of the people skills that she's better at and cares about more. It'd be a mistake not to think of her as very numerical and interested in the science. I enjoy, if I get ahead of her, say, understanding the immune system, then we can spend a few hours, where I'm going through how amazing it is and interesting, and how that affects our creating new products, so I've always had a partner.

Lectures should go from being like the family singing around the piano to high-quality concerts.

I don't think culture is something you can describe.