One of the main reasons was the influence of his father. Thus the connection to this blog.
You can listen to this in your browser, download a pdf of the message, or download a MP3 here. It is worth more than the hour and twenty minutes it will take you to listen to it. I have listened to it so many times I just about have it memorized.
Enjoy. I would love to hear your reactions to it when you have had a chance to listen. Let me know in the comments.