This excellent book is divided into 2 parts: The disease and the cure, and the latter consists of 3 sections: Accentuate the positive, Eliminate the negative and Latch onto the affirmative. It explains the fight or flight response, the effect thoughts have on the body, and the question of death.
It also deals with mourning, how to focus on the positive and has a useful section on depression. Suitable quotes by inter alia Freud, Santayana, Voltaire, Emerson, Russell, Shaw, Anais Nin, Epicurus, Whitman, Keller, Hippocrates, Oscar Wilde and Maria Montessori enhance the text and help to explain things.
I would not say that it is absolutely the best self-help book I've ever read, but it casts welcome new light on this thing called "common sense." It is a pleasure to read and I highly recommend it.