Here are parts 13 and 15 of Napoleon Hill’s 17 Principles Of Personal Achievement.
Positive Mental Attitude - To govern your life, you must be able to govern your mind, and that is the starting point of all riches.
I played baseball against a kid who later 
pitched for the San Diego Padres in the World Series. He was big and left-handed, and used to throw rocks at me in sixth grade when we were crossing guards. Facing him in a game, I decided not to be intimidated – hey, it couldn’t be worse than rocks. A walk, two doubles and four RBIs later….
Sound Physical Health - The key that coordinates all other principles and sets all ideas into motion, sound health provides the "flavor" to the good things in life.
Somehow, many of my friends are aging. Some have stopped playing sports, some have bad knees, some are just too tired to do things they used to. I notice people my age in the Obituaries. People my age read the Obituaries. In the end, not much matters more than our health, and money can’t protect you. Ask George Harrison.
