There are innumerable writing problems in an extended work. One book took a little more than six years. You, the writer, change in six years. The life around you changes. Your family changes. They grow up. They move away. The world is changing. You're also learning more about the subject. By the time you're writing the last chapters of the book, you know much more than you did when you started at the beginning.
Take the teacher not the course. Find out who the great professors are - the great teachers - and take their courses because a subject that you may not think you're interested in may turn out to be infinitely fascinating because of the way it's taught.
We still dislike hypocrites. It's a very American characteristic. We still like people who have ideas and who are willing to stand up for what they believe in. We're very forgiving of failures and very willing to give people a second and third chance if they mean to do better and are sorry for what they've done.
George P. A. Healy; "I knew no one in France, I was utterly ignorant of the language, I did not know what I should do when once there; but I was not yet one-and-twenty, and I had a great stock of courage, of inexperience—which is sometimes a great help—and a strong desire to be my very best.
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.
I could not do what I do without the kindness, consideration, resourcefulness and work of librarians, particularly in public libraries. What started me writing history happened because of some curiosity that I had about some photographs I'd seen in the Library of Congress.
The talent, including the talent for history - and I do think there are people who just have a talent for it, the way you have a talent for public speaking or music or whatever - it shouldn't be allowed to lie dormant. It should be brought alive.