When the founders wrote about life, liberty, and the pursuit of happiness, they didn't mean longer vacations and more comfortable hammocks. They meant the pursuit of learning. The pursuit of improvement and excellence. In hard work is happiness.

Since September 11, it seems to me that never in our lifetime, except possibly in the early stages of World War II, has it been clearer that we have as a source of strength, a source of direction, a source of inspiration - our story.

Exercise free will and creative, independent thought not for the satisfactions they will bring you, but for the good they will do others, the rest of the 6.8 billion–and those who will follow them. And then you too will discover the great and curious truth of the human experience is that selflessness is the best thing you can do for yourself. The sweetest joys of life, then, come only with the recognition that you’re not special. Because everyone is.

History is not just about dates and quotations. And it's not just about politics, the military and social issues, though much of it of course is about that. It's about everything. It's about life history. It's human. And we have to see it that way. We have to teach it that way. We have to read it that way. It's about art, music, literature, money, science, love - the human experience.

You can't love what you don't know much about. You can't convince, stimulate, hold the attention, teach, if you don't know what you're talking about.

Once I discovered the endless fascination of doing the research and of doing the writing, I knew I had found what I wanted to do in my life. Every book is a new journey. I never felt I was an expert on a subject as I embarked on a project.

People often ask me if I'm working on a book. That's not how I feel. I feel like I work in a book. It's like putting myself under a spell. And this spell, if you will, is so real to me that if I have to leave my work for a few days, I have to work myself back into the spell when I come back. It's almost like hypnosis.