Teaching's hard! You need different skills: positive reinforcement, keeping students from getting bored, commanding their attention in a certain way.

I don't have a magic formula for prioritizing the world's problems.

Well, I don't think there's any need for people to focus on my career.

To succeed, you also have to know how to make choices and how to think more broadly.

I'm going to retain a lot of Microsoft's stock.

Success is a lousy teacher. It seduces smart people into thinking they can't lose.

Well-spent aid money is saving lives for a few thousand dollars per life saved.