The writer ... an athlete required to break the four-minute mile every morning.

The one who has not seen Paris in the morning does not know how beautiful it is.

I spend several years trying to get inside the brain and heart of my subjects, listening to the interior monologues in their letters, and when I have to bridge the chasms between the factual evidence, I try to make an intuitive leap through the eyes and motivation of the person I'm writing about.

There is no thrill of mortal danger to surpass that of a lone man trying to create something that never existed before.

I knew that I had to find out more about van Gogh. Even though I was far too young, and felt I did not have sufficient technique to write a book about Vincent van Gogh, I knew I had to try. If I didn't I would never write anything else.

There are neither good nor evil, only the existence and action.

If it is noticed that much of my outside work concerns itelf with libraries, there is an extremely good reason for this. I think that the better part of my education, almost as important as that secured in the schools and the universities, came from libraries.