We weren't trying to just go public and get rich. There was no near-term thing. It always was this many-decades thing where there were no shortcuts and we'd sort of put one foot in front of the other.

With polio, we've gone several years with no polio in all of Africa, but now with this we're having to go and mop up in that whole region, so it's a bit of a setback for polio. So in parallel we have to go back and get rid of those cases.

It is hard to overstate how valuable it is to have all the incredible tools that are used for human disease to study plants.

Most people overestimate what they can do in one year and underestimate what they can do in ten years.

My grade point average went from a 2.2 to a 4.0 over the summer. I wanted to get straight A's. I decided to get straight A's. I didn't want people to think I was dumb. And when you get straight A's once, its easier.

Giving money effectively is almost as hard as earning it in the first place.

I want to make clear that we respect the role of government in our legal andeconomic system.