When somebody has convinced you that you're not worth anything to anybody anymore, and they spend a lot of time doing it, you start believing it yourself.
I sometimes feel that if your book sells more than 20 years, then there's something in it that you can say, gee, I did something that endures, that's timeless.
The essential element in personal magnetism is a consuming sincerity - an overwhelming faith in the importance of the work one has to do.