=Psycho-Analysis.= Freud's contribution has been not only a discovery of the general causes of nervousness, but a special means of locating the cause in any particular case. Abandoning hypnosis, he developed another method which he called psycho-analysis. What chemical analysis is to chemistry, psycho-analysis is to the science of the mind. It splits up the mental content into its component parts, the better to be examined and modified by the conscious mind. Psycho-analysis is merely a technical process for discovering repressed complexes and bringing them into consciousness, where they may be recognized for what they are and altered to meet the demands of real life. It is a device for finding and removing the cause of nervousness,--for bringing to light hidden desires which may be honestly faced and efficiently directed instead of being left to seethe in dangerous insurrection. In order permanently to break up a real neurosis, a man must first know himself and then change himself. He must gain insight into his own mental processes and then systematically set to work to change those processes that unfit him for life. We shall later find that a detailed self-discovery through psycho-analysis is not always necessary, and that a more general understanding of oneself is sufficient for the milder kinds of nervousness. But because of the promise which psycho-analysis holds out to those stubborn cases before which other methods are powerless; because of the invaluable understanding of human nature which it places at the disposal of all nervous people, who may profit by its findings without undergoing an analysis; and because of the flood of light which it sheds on the motives, conduct, and character of every human being, no educated person can afford to be without a general knowledge of psycho-analysis.[41] [Footnote 41: It is unfortunate that the records of an analysis are too voluminous for use in so brief an account as this. Since the report of one case would fill a book, and a condensed summary would require a chapter, we must refer to some of the volumes which deal exclusively with the psychoanalytic principles. For a list of these books, see Bibliography.]