Foreign policy is now a huge field. It isn't just people who are studying political science. There are so many aspects to it in terms of understanding hard science for people who are studying climate change, or people who are interested in health policy or food security, or people who care about education.

One of the things I write about a bit in my Madam Secretary memoir is on Rwanda, where I was an instructed ambassador at the U.N., and my instructions were to not vote for increased forces there, and I didn't like my instructions. So I got up and called Washington and said, "Change my instructions," and they didn't.

We live in an image society. Speeches are not what anybody cares about; what they care about is the picture.

I have always seen the United States as a force of good. And I have learned that there is the idealistic part about what we can do at the U.N. and there is a doable part. And I have learned what is more doable.

US is a very religious country. Separation of church and state is part of our credo, but that it is hard to understand since our money says "In God we trust" and every President says "God bless America".

There are an awful lot of things going on that need understanding and explanation, but - to put it mildly - the world is a mess.

No one has done what Saddam Hussein has done, or is thinking of doing. He is producing weapons of mass destruction, and he is qualitatively and quantitatively different from other dictators.