Good leadership requires you to surround yourself with people of diverse perspectives who can disagree with you without fear of retaliation.

Many kids think unless they go to one of these great Ivy League schools, which I was lucky enough to go to later, that they won't get the same kind of learning. But I learned just the opposite lesson; that my best teachers were not at Harvard University.

It took me five years on Lyndon Johnson, ten years on the Kennedys, six years on the Roosevelts. Inevitably, you get shaped by the people that you're thinking about during that period of time.

You can be enormously effective for a period of time, because it's almost like there's an engine in you that needs to keep going, and you have a greater drive than other people - who may be more happy and balanced in life - because you have to keep going out and proving yourself over and over again.

I think confidence comes from doing something well, working at it hard, and you build it up. It's not something you're born with. You have to build the confidence as you go along.

I think the most important thing I wanted to say at various times to Franklin and Eleanor Roosevelt was that it seemed so sad to me that - I really believe they loved each other and had a great deal of affection - but because of that early hurt in their marriage, there was a certain kind of distance from then on, until their deaths actually. So at times, I just wanted to push them together and say, "Come on, you guys! I know you love each other. This is crazy!"

When I look at Franklin Roosevelt's leadership, I think the most important quality he had during the Depression and the war was this absolute confidence in himself, in his country, really in the American people. He was able to exude that confidence and almost project it.