And here we approach a point of much interest. Hypnotic suggestion or self-suggestion is not an agency which stands wholly alone. It melts into the suasion of ordinary life. Ministers of religion as well as physicians have always wielded with authority the suasive power. From the crude animistic dances and ceremonies of the savage up to the "missions" and "revivals" in English and American churches and chapels, we find sudden and exciting impressions on mind and sense called into play for the purpose of producing religious and moral change.[91] Among the lower races especially these exciting reunions often involve both hysterical and hypnotic phenomena. There are sometimes convulsive accesses and there is sometimes the milder phenomenon of a deep restorative sleep. The influence exerted upon the convert is intermediate between hypnotic artifice, dependent on trance-states for access to subliminal plasticity, and ordinary moral suasion, addressed primarily to ordinary waking reason.
Let us pause here to consider the point which we have already reached. We began by defining hypnotism as the empirical development of the sleeping phase of man's personality. In that sleeping phase the most conspicuous element—the most obvious function of the subliminal self—is the repair of wasted tissues, the physical, and therefore also largely the moral, refreshment and rejuvenation of the tired organism.
But we found reason to believe that the subliminal self has other functions to fulfil during sleep. Those other functions are concerned in some unknown way with the spiritual world; and the indication of their exercise is given by the sporadic occurrence, in the sleeping phase, of supernormal phenomena. Such phenomena, as we shall presently see, occur also at various points in hypnotic practice. To them we must now turn, if our account of the phenomena of induced somnambulism is to be complete.
Yet here, in order to give completeness to our intended review, we shall need a certain apparent extension of the scope of this chapter. We shall need to consider a group of cases which might have been introduced at various points in our scheme, but which are perhaps richest in their illustrations of the supernormal phenomena of hypnotism.
Spontaneous somnambulisms,—those crude uprushes of incoherent subliminal faculty which sometimes break through the surface of sleep,—seem to occupy a kind of midway position among the various phenomena through which our inquiry has thus far carried us.
The somnambulism often starts as an exaggerated dream; it develops into a kind of secondary personality. The thoughts and impulses which the upheaval raises into manifestations—the psychical output—resemble sometimes the inspirations of genius, sometimes the follies of hysteria. And, finally, the spontaneous sleep-waking state itself is manifestly akin to hypnosis,—is sometimes actually interchangeable with the induced somnambulisms of the hypnotic trance. The chain of memory which repeated spontaneous somnambulisms gradually form,—while lying quite outside the primary or waking memory,—will often be found to form a part of the hypnotic memory, which gradually accretes in similar fashion from repeated hypnosis.
For one form of sleep-waking capacity we are already prepared by what has been said in Chapter IV. of the solution of problems in sleep. This is one of the ways in which we can watch the gradual merging of a vivid dream into a definite somnambulic act. The solution of a problem (as we have seen) may present itself merely as a sentence or a diagram, constructed in dream and remembered on waking. Or the sleeper (as in various cases familiar in text-books) may rise from bed and write out the chain of reasoning, or the sermon, or whatever it may be. Or again, in rarer cases the somnambulic output may take the form of oratory, and edifying discourses may be delivered by a preacher whom no amount of shaking or pinching will silence or, generally, even interrupt. This, so to speak, is genius with a vengeance; this is a too persistent uprush of subliminal zeal, co-operating even out of season with the hortatory instincts of the waking self.
The group of sleep-waking cases which we may next discuss illustrates a natural evolution of the faculty of the sleeping phase of personality. The subliminal self, exercising in sleep a profounder influence over the organism than the supraliminal can exert, may also be presumed to possess a profounder knowledge of the organism—of its present, and therefore of its future—than the supraliminal self enjoys.
There are cases[92] in which the somnambulic personality is discerned throughout as a wiser self—advising a treatment, or at least foreseeing future developments of the disease with great particularity. Of course, in such a case prediction is often simply a form of suggestion; the symptom occurs simply because it has been ordained beforehand. In the case of cures of long-standing disease the sagacity which foresees probably co-operates with the control which directs the changes in the organism.
The next stage is a very important one. We come to the manifestation in spontaneous sleep-waking states of manifestly supernormal powers,—sometimes of telepathy, but more commonly of clairvoyance or telæsthesia. Unfortunately, these cases have been, as a rule, very insufficiently observed. Still, it appears that in spontaneous somnambulism there is frequently some indication of supernormal powers, though the observers—even if competent in other ways—have generally neglected to take account of the hyperæsthesia and heightening of memory and of general intelligence that often accompany the state.