the principles of character-formation. The laws and mechanisms which govern the everyday life of the normal person are the same laws and mechanisms which make the nervous person ill. As Boris Sidis puts it, "The pathological is the normal out of place." The person who is master of himself, working together as a harmonious whole, is stronger in every way than the person whose forces are divided. Given a little self-knowledge, the nervous invalid often becomes one of the most successful members of society,—to use the word successful in the best sense.

It Pays to Know. To be educated is to have the right idea and the right emotion in the right place. To be sure, some people have so well learned the secret of poise that they do not have to study the why nor the how. Intuition often far outruns knowledge. It would be foolish indeed to suggest that only the person versed in psychological lore is skilled in the art of living.

Psychology is not life; it can make no claim to furnish the motive nor the power for successful living, for it is not faith, nor hope, nor love; but it tries to point the way and to help us fulfil conditions. There is no more reason why the average man should be unaware of the instincts or the subconscious mind, than that he should be ignorant of germs or of the need of fresh air.

If it be argued that character and health are both inherently by-products of self-forgetful service, rather than of painstaking thought, we answer that this is true, but that there can be no self-forgetting when things have gone too far wrong. At such times it pays to look in, if we can do it intelligently, in order that we may the sooner get our eyes off ourselves and look out. The pursuit of self-knowledge is not a pleasurable pastime but simply a valuable means to an end.

Knowing Our Machine

Counting on Ourselves. Knowing our machine makes us better able to handle it. For, after all, each of us is, in many ways, very like a piece of marvelous and complicated machinery. For one thing, our minds, as well as our bodies, are subject to uniform laws upon which we can depend. We are not creatures of chaos; under certain conditions we can count on ourselves. Freedom does not mean freedom from the

reign of law. It means that, to a certain extent, we can make use of the laws. Psychic laws are as susceptible to investigation, verification, and use as are any laws in the physical world. Each person is so much the center of his own life that it is very easy for him to fall into the way of thinking that he is different from all the rest of the world. It is a healthful experience for him to realize that every person he meets is made on the same principles, impelled by the same forces, and fighting much the same fight. Since the laws of the mental world are uniform, we can count on them as aids toward understanding other people and understanding ourselves.

"Intelligent Scrutiny versus Morbid Introspection." It helps wonderfully to be able to look at ourselves in an objective, impersonal way. We are likely to be overcome by emotion, or swept by vague longings which seem to have no meaning and which, just because they are bound up so closely with our own ego, are not looked at but are merely felt. Unknown forces are within us, pulling us this way and that, until sometimes we who should be masters are helpless slaves. One great help toward mastery and one long step toward serenity is a working-knowledge of the causes and an impersonal interest in the phenomena going on within. Introspection is a morbid, emotional fixation on self, until it takes on this quality of objectivity. What

Cabot calls the "sin of impersonality" is a grievous sin when directed toward another person, but most of us could stand a good deal of ingrowing impersonality without any harm.

The fact that the human machine can run itself without a hitch in the majority of cases is witness to its inherent tendency toward health. People were living and living well through all the centuries before the science of psychology was formulated. But not with all people do things run so smoothly. There were demoniacs in Bible times and neurotics in the Middle Ages, as there are nervous invalids and half-well people to-day. Psychology has a real contribution to make, and in recent years its lessons have been put into language which the average man can understand.

Psychology is not merely interested in abstract terms with long names. It is no longer absorbed merely in states of consciousness taken separately and analyzed abstractly. The newer functional psychology is increasingly interested in the study of real persons, their purposes and interests, what they feel and value, and how they may learn to realize their highest aspirations. It is about ordinary people, as they think and act, in the kitchen, on the street cars, at the bargain-counter, people in crowds and alone, mothers and their babies, little children at play, young girls with their lovers, and all the rest of human life. It is the science of you, and

as such it can hardly help being interesting.

While psychology deals with such topics as the subconscious mind, the instincts, the laws of habit, and association of ideas and suggestion, it is after all not so much an academic as a practical question. These forces govern the thought you are thinking at this moment, the way you will feel a half-hour from now, the mood you will be in to-morrow, the friends you will make and the profession you will choose, besides having a large share in the health or ill-health of your body in the meantime.

Summary

Perhaps it would be well before going farther to summarize what we have been saying. Here in a nutshell is the kernel of the subject:

Disease may be caused by physical or by psychic forces. A "nervous" disorder is not a physical but a psychic disease. It is caused not by lack of energy but by misdirected energy; not by overwork or nerve-depletion, but by misconception, emotional conflict, repressed instincts, and buried memories. Seventy-five per cent. of all cases of ill-health are due to psychic causes, to disjointed thinking rather than to a disjointed spine. Wherefore, let us learn to think right.

In outline form, the trouble in a neurosis may be stated something like this:

 
Lack of adaptation to the social environment—caused by
Lack of harmony within the personality—caused by
Misdirected energy—caused by
Inappropriate emotions—caused by
Wrong ideas or ignorance.
 

Working backward, the cure naturally would be:

 
Right ideas—resulting in
Appropriate emotions—resulting in
Redirected energy—resulting in
Harmony—resulting in
Readjustment to the environment.
 

If the reader is beginning to feel somewhat bewildered by these general statements, let him take heart. So far we have tried merely to suggest the outline of the whole problem, but we shall in the future be more specific. Nervous troubles, which seem so simple, are really involved with the whole mechanism of mental life and can in no way be understood except as these mechanisms are understood. We have hinted at some of the causes of "nerves," but we cannot give a real explanation until we explain the forces behind them. These forces may at first seem a bit abstract, or a bit remote from the main theme, but each is essential to the story of nerves and to the understanding of the more practical chapters in Part III.

As in a Bernard Shaw play, the preface may be the most important part of this "drama of nerves." Nor

is the figure too far-fetched,