Now under special conditions, the ideas making up an experience at any given moment tend to become organized into a system or complex, so that when we later think of the experience or recall any of the ideas belonging to it, the complex as a whole is revived. This is one of the principles underlying the mechanism of memory. Thus it happens that memory may, to a large extent, be made up of complexes. These complexes may be very loosely organized in that the elementary ideas are weakly bound together, in which case, when we try to recall the original experience, only a part of it is recalled. Or a complex may be very strongly organized, owing to the conditions under which it is formed, and then a large part of the experience can be recalled. In this case, any idea associated with some element in the complex may, by the law of association, revive the whole original complex. If, for instance, we have gone through a railroad accident involving exciting incidents, loss of life, etc., the words "railroad," "accident," "death," or a sudden crashing sound, or the sight of blood, or even riding in a railroad train may recall the experience from beginning to end, or at least the prominent features in it, i.e., so much as was organized. The memory of the greater part of this experience is well organized, while the earlier events and those succeeding the accident may have passed out of all possibility of voluntary recall.

To take an instance commonplace enough but which happens to have just come within my observation: A fireman was injured severely by being thrown from a hose wagon rushing to a fire against a telegraph pole with which the wagon collided. He narrowly escaped death. Although three years have passed he still cannot ride on a wagon to a fire without the memory of the whole accident rising in his mind. When he does so he again lives through the accident, including the thoughts just previous to the actual collision when, realizing his situation, he was overcome with terror, and he again manifests all the organic physical expressions of fear, viz.: perspiration, tremor, and muscular weakness. Here is a well-organized and fairly limited complex.

Among the loosely organized complexes in many individuals, and possibly in all of us, there are certain dispositions toward views of life which represent natural inclinations, desires, and modes of activity which, for one reason or another, we tend to suppress or are unable to give full play to. Many individuals, for example, are compelled by the exactions of their duties and responsibilities to lead serious lives, to devote themselves to pursuits which demand all their energies and thought and which, therefore, do not permit of indulgence in the lighter enjoyments of life, and yet there may be a natural inclination to partake of the pleasures which innately appeal to all mankind and which many pursue. The longing for these recurs from time to time. The mind dwells on them, the imagination is excited and weaves a fabric of pictures, thoughts, and emotions which thus become associated into a complex. There may be a rebellion and "kicking against the pricks" and thereby a liberation of the emotional force that impresses a stronger organization on the whole process. The recurrence of such a complex is one form of what we call a "mood," which has a distinctly emotional tone of its own. The revival of this feeling tone tends to revive the associated ideas and vice versa. Such a feeling-idea complex is often spoken of as "a side to one's character," to which a person may from time to time give play. Or the converse of this may hold, and a person who devotes his life to the lighter enjoyments may have aspirations and longings for more serious pursuits, and in this respect the imagination may similarly build up a complex which may express itself in a mood. Thus a person is often said to have "many sides to his character," and exhibits certain alternations of personality which may be regarded as normal prototypes of those which occur as abnormal states.

Most of what has been said about the formation of complexes is a statement of commonplace facts, and I would not repeat it here were it not that, in certain abnormal conditions, disposition, subject, and other complexes, though loosely organized, often play an important part. This is not the place to enter into an explanation of dissociated personality, but in such conditions we sometimes find that disposition complexes, for instance, come to the surface and displace or substitute themselves for the other complexes which make up a personality. A complex which is only a mood or a "side of the character" of a normal individual may, in conditions of dissociation, become the main, perhaps sole, complex and chief characteristic of the new personality. In Miss Beauchamp, for instance, the personality known as BI was made up almost entirely of the religious and ethical ideas which formed one side of the original self. In the personality known as Sally we had for the most part the complex which represented the enjoyment of youthful pleasures and sports, the freedom from conventionalities and artificial restraints generally imposed by duties and responsibilities. In BIV the complex represented the ambitions and activities of practical life. In Miss Beauchamp as a whole, normal, without disintegration, it was easy to recognize all three dispositions as "sides of her character," though each was kept ordinarily within proper bounds by the correcting influence of the others. It was only necessary to put her in an environment which encouraged one or the other side, to associate her with people who strongly suggested one or the other of her own characteristics, whether religious, social, pleasure loving, or intellectual, to see the characteristics of BI, Sally, or BIV stand out in relief as the predominant personality. Then we had the alternating play of these different sides of her character.

In fact, the total of our complexes, which, regarded as a whole and in view of their reaction to the environment, their behavior under the various conditions of social life, their aptitudes, feeling-tones, "habits," and faculties, we term character and personality, are in large part predetermined by the mental experiences of the past and the vestiges of memory which have been left as residual from these experiences. We are the offspring of our past.

The great mass of our ideas involve associations of the origin of which we are unaware because the memories of the original experience have become split and a large portion thus has become forgotten even if ever fully appreciated. We all have our prejudices, our likes and dislikes, our tastes and aversions; it would tax our ingenuity to give a sufficient psychological account of their origin. They were born long ago in educational, social, personal, and other experiences, the details of which we have this many a year forgotten. It is the residua of these experiences that have persisted and become associated into complexes which are retained as traits of our personality.

3. The Self as the Individual's Conception of His Rôle[71]

Suggestion may have its end and aim in the creation of a new personality. The experimenter then chooses the sort of personality he wishes to induce and obliges the subject to realize it. Experiments of this kind succeeding in a great many somnambulists, and usually producing very curious results, have long been known and have been repeated, one might say, almost to satiety within the last few years.

When we are awake and in full possession of all our faculties we can imagine sensations different from those which we ordinarily experience. For example, when I am sitting quietly at my table engaged in writing this book, I can conceive the sensations that a soldier, a woman, an artist, or an Englishman would experience in such and such a situation. But, however fantastic the conceptions may be that we form, we do not cease to be conscious withal of our own personal existence. Imagination has taken flight fairly in space, but the memory of ourselves always remains behind. Each of us knows that he is himself and not another, that he did this yesterday, that he has just written a letter, that he must write another such letter tomorrow, that he was out of Paris for a week, etc. It is this memory of passed facts—a memory always present to the mind—that constitutes the consciousness of our normal personality.

It is entirely different in the case of the two women, A—— and B——, that M. Richet studied.