Having now, as it were, a chart, imperfect though it be, of this outlying region, having some idea what to look for, and in what direction to look for it, it is possible that glimpses of this subliminal personality which each one unconsciously carries with him may be obtained under ordinary conditions and in everyday life, more frequently and more easily than we had imagined; for, as Ribot expresses it, the ordinary conscious personality is only a feeble portion of the whole psychical personality.

One example of this more usual form of double personality is afforded in ordinary dreaming. The dream country, like most of this outlying territory, has for the most part been studied without chart or compass. There is scarcely a point connected with the discussion of the subject upon which the most eminent authorities are not divided; it is Locke against Descartes, Hamilton against Locke, and Hobbes against the field.

If there be any one point, however, on which there is tolerable unanimity among all writers, ancient and modern, great and small, it is the absence in dreams of the normal acts and processes of volition, and, especially, of the faculty of attention. Now, this is exactly the condition which is conducive to the more or less perfect emergence and activity of the subliminal self, under whatever circumstances it occurs.

There is first, loss of consciousness from catalepsy, fright, depressing illness, hypnotism, or natural sleep, that is to say, the power of attention or volition in the primary self is abolished; then comes a readjustment of personalities, varying in completeness according to the ease with which, in different persons, this readjustment may be effected, and according to the completeness of the abolition of the power of attention and volition.

In sleep the conditions are favorable for this readjustment, and the subliminal self comes more or less perfectly to the surface; then appears that most peculiar and interesting series of pictures and visions which we call dreams; sometimes the rearranged, or rather unarranged, impressions and perceptions of the waking hours brought together, possibly just before the power of attention is entirely lost; sometimes the Puck-like work of the subliminal personality, the Léontines of the dream-country influencing the unconscious or semi-conscious primary self; sometimes the veridical or truth-telling dreams, which have been the wonder of all ages, and sometimes giving complete and active supremacy to the subliminal self as in natural somnambulism. Another portion of the field in which it might be profitable to look for evidence of the existence of a subliminal personality is in the eccentric work of genius; and still another, in the unexpected and often heroic actions of seemingly ordinary persons under the stress and stimulus of a great emotion, as of joy, sorrow, or anger, or of intense excitement, as for instance, the soldier in battle, the fireman at the post of danger, or the philosopher or astronomer on the eve of a new discovery; in all these cases the ordinary personality with its intense self-consciousness and self-considering carefulness is submerged—it disappears—the power of voluntary attention to mental states or physical action is lost; a new and superior personality comes to the surface and takes control. The supreme moment passes, and the primary self resumes sway, scarcely conscious of what has been done or how it was accomplished; even sensation has been abolished, and it is only now that he discovers the bleeding bullet-wound, the charred member, or the broken bone.

In physical science, whenever some new fact or law or principle has been discovered, it is at once seen that many things which before were obscure, or perhaps could only be accounted for by a theory of chance, or of direct interference by an omnipotent Deity, are now illuminated by a new light, and order reigns where before only confusion and darkness were visible. Something of the same sort is beginning to be recognized in the world of mental and psychical phenomena. If the mathematical exactness which measured the force of gravity, or placed the sun in one of the foci of an ellipse instead of the centre of a circle cannot be applied here, it is only on account of the vast complexity of the problem presented, and of which we know so few of the elements.

When matter alone is concerned we know exactly how it will act under given conditions. When life is added, the problem becomes more complex. The general law of evolution and the special law of natural selection in the development of species are accepted facts, although we cannot with success apply to them mathematical formulæ. When mind is added to life, the problem becomes still more complicated and mathematical exactness still less likely to be attained. Many facts, however, are being ascertained in psychical science, and some principles are being established which help to bring order out of confusion and shed light on some dark places.

The recognition of a subliminal self as forming a part of the psychical organization of man will throw light upon many obscure mental phenomena and bring order out of seemingly hopeless confusion. Placed before us as a working hypothesis, many other facts, before errant and unclassified, group themselves about it in wonderful clearness and harmony.

Granting, then, provisionally at least, the reality of the secondary self, what are its relations to the primary self and their common physical organization, and how came it to occupy these relations? Mr. Frederick W. H. Myers, to whom I have already referred, whose acute intellect and scholarly attainments have been of the highest value to the society in every department of its investigations, has also taken up this subject with his usual skill and judgment. He looks upon it from the standpoint of evolution, commencing with the earliest period of animal life. He compares the whole psychical organization, together with its manifesting physical organization, to the thousand looms of a vast manufactory.

The looms are complex and of varying patterns, for turning out different sorts of work. They are also used in various combinations, and there are various driving bands and connecting machinery by which they may severally be connected or disconnected, but the motive power which drives the whole is constant for all, and all works automatically to turn out the styles of goods that are needed.