It's only right on if you have Christ as your foremost leader and guiding principle. I believe Napoleon Hill is expressing the importance of having faith, however, it could land on some people as if it's to have faith in themselves as if they were God of their own universe
Considering when this was written, it just goes to show you that wisdom can be timeless. I can imagine Moses giving Joshua this speech when the Lord inspired him to say "be strong and courageous and do not be afraid."
Loved everything about this book except the regular and largely useless interjections of the editor! To restate the lines from the manuscript and then offer questions or suggestions is largely pointless and added little value to the original content. Apart from that this is a very thought provoking book with some interesting concepts and insights.