The past is not simply the past, but a prism through which the subject filters his own changing self-image.

Once a president gets to the White House, the only audience that is left that really matters is history.

A lot of times when people are on campaigns, it can be like a movie set.

As a historian, what I trust is my ability to take a mass of information and tell a story shaped around it.

I am a historian. With the exception of being a wife and mother, it is who I am. And there is nothing I take more seriously.

I've been to the White House a number of times.

My books are written with a strong chronological spine.

I now rely on a scanner, which reproduces the passages I want to cite, and then I keep my own comments on those books in a separate file so that I will never confuse the two again.

I really believe that what happens one day affects the next, and I think that came from that experience of learning that if I told the score inning by inning, play by play, it built up to its natural climax.

I shall always be grateful for this curious love of history, allowing me to spend a lifetime looking back into the past, allowing me to learn from these large figures about the struggle for meaning for life.

I wish we could go back to the time when the private lives of our public figures were relevant only if they directly affected their public responsibilities.

Ironically, the more intensive and far-reaching a historian's research, the greater the difficulty of citation. As the mountain of material grows, so does the possibility of error.

My recurring nightmare is that someday I will be faced with a panel: Franklin Roosevelt, John Kennedy and Lyndon Johnson all of whom will be telling me everything I got wrong about them. I know that Johnson's out there saying, 'Why is it that what you wrote about the Kennedys is twice as long as the book you wrote about me?'

That is what leadership is all about: staking your ground ahead of where opinion is and convincing people, not simply following the popular opinion of the moment.

The only protection as a historian is to institute a process of research and writing that minimizes the possibility of error. And that I have tried to do, aided by modern technology, which enables me, having long since moved beyond longhand, to use a computer for both organizing and taking notes.

Those who knew Lincoln described him as an extraordinarily funny man. Humor was an essential aspect of his temperament. He laughed, he explained, so he did not weep.

We've got to figure out a way that we give a private sphere for our public leaders. We're not gonna get the best people in public life if we don't do that.

Where's the progress that we're going to see in Afghanistan? You have to keep public support both on the economy and the war or these things will really become troubling.