The main subject of the book is best stated in a quote from C. S. Lewis: "Often we need not so much to be taught as to be reminded." As I said in the Foreword, "How many times over the years I have reached for a scrap of paper or underlined a passage or quotation in a book, noting something that seemed wise and useful. However, as I review my notes, I frequently come upon some guideline to positive thought or behavior that I have simply let drift from my memory and have neglected to practice." The remedy? That is the purpose of this book: to summarize, briefly enough for quick and regular...