"You will learn: 10 rules for setting and achieving goals; 4 creative factors that lead to successful outcomes; a 4-part daily prescription for peace of mind; 10 'of course you can' principles; a 3-point formula for getting rid of depression; 6 positive thoughts to eliminate destructive habits; a 3-part blueprint for spiritual and physical health, and the single most important step toward becoming a positive person" (I read this many years ago, and found it to be helpful then.)
Religious undertones. Peale was a preacher and most of his writings reflect this. It states on the back that "If you send out negative thoughts, negative thoughts will return. If you send out robust thoughts of faith, hope, and optimism, positive thoughts will come surging back." But really, isn't that the basis of "The Secret" also? IMHO, it's what Wicca is all about. Don't send any negative out or else it will come back to you three-fold.