I believe the government has the right to recover from the heirs to the fortunes of its most successful citizens some portion of those fortunes.

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

There was a concept a long time ago that you would do a different type of reactor called a "fast reactor," that would make a bunch of another element called plutonium, and then you would pull that out, and then you would burn that. That's called "breeding" in a fast reactor. That is bad because plutonium is nuclear weapons material. It's messy. The processing you have to get through is not only environmentally difficultly, it's extremely expensive.

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

[AIDS ] is not a short-term emergency but it is something that, just like smallpox was many decades ago, we should aim for complete eradication.

The world won't care about your self-esteem. The world will expect you to accomplish something BEFORE you feel good about yourself.

We got a malaria initiative, really a phenomenal time, even though in the early stages there was some uncertainty. Then of course [Barack] Obama, although he had budget constraints, he believed in these things; a lot of new initiatives, including in agriculture.