I think with Lyndon Johnson, the most important thing I learned was that he never had the sense of security that comes from inside. It always depended on other people making him feel good about himself, which meant that he was always beholden, continually needing to succeed. He could never stop. There was such a restlessness in him.

What I learned, more than anything, was that you can't have it all balanced perfectly at any one time. When I was young, it was much more balanced toward work. When I had my children, it was much more balanced toward love and family, and I didn't get a lot of work done. So you can't ask of it to be perfectly balanced at any time, but your hope is, before you die, you've somehow had each of those spheres come to life. That's probably more important than success in any one of those spheres alone.

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!"

Sometimes people will find things that are wrong. Sometimes they will even find an approach that you took wrong. If you think you took the right approach, then you just absorb the criticism, but you don't change your mind.

When I look at what a writer owes to the reader, it's critical to know that everything you're writing about is not made up in your head. I feel that unless you can document and be certain about what it is that you're writing about, the reader is going to lose faith in your own integrity.

My books are written with a strong chronological spine.

He (William Howard Taft) had little patience with the unconscious arrogance of conscious wealth and financial success.