We have already, indeed, seen reason to suppose that the submerged perceptions are still at work, when Dr. Janet pointed out how rare a thing it was that any accident or injury followed upon hysterical loss of feeling in the limbs. A still more curious illustration is afforded by the condition of the field of vision in a hysteric. It often happens that the field of vision is much reduced, so that the hysteric, when tested with the perimeter, can discern only objects almost directly in front of the eye. But if an object which happens to be particularly exciting to the hypnotic stratum—for instance the hypnotiser's finger, used often as a signal for trance—is advanced into that part of the hysteric's normal visual field of which she has apparently lost all consciousness, there will often be an instant subliminal perception,—shown by the fact that the subject promptly falls into trance.
In such cases the action of the submerged perceptions, while provoked by very shallow artifices, continues definitely subliminal. The patient herself, as we say, does not know why she does not burn her anæsthetic limbs, or why she suddenly falls into a trance while being subjected to optical tests.
But it is equally easy to devise experiments which shall call these submerged sensations up again into supraliminal consciousness. A hysteric has lost sensation in one arm: Dr. Janet tells her that there is a caterpillar on that arm, and the reinforcement of attention thus generated brings back the sensibility.
These hysterical anæsthesiæ, it may be added here, may be not only very definite but very profound. Just as the reality,—though also the impermanence,—of the hysterical retrenchment of field of vision of which I have been speaking can be shown by optical experiments beyond the patient's comprehension, so the reality of some profound organic hysterical insensibilities is sometimes shown by the progress of independent disease. A certain patient feels no hunger or thirst: this indifference might be simulated for a time, but her ignorance of severe inflammation of the bladder is easily recognisable as real. Throw her into hypnosis and her sensibilities return. The disease is for the first time felt, and the patient screams with pain. This result well illustrates one main effect of hypnosis, viz., to bring the organism into a more normal state. The deep organic anæsthesia of this patient was dangerously abnormal; the missing sensibility had first to be restored, although it might be desirable afterwards to remove the painful elements in that sensibility again, under, so to say, a wiser and deeper control.
What has been said of hysterical defects of sensation might be repeated for motor defects. There, too, the powers of which the supraliminal self has lost control continue to act in obedience to subliminal promptings. The hysteric who squeezes the dynamometer like a weak child can exert great muscular force under the influence of emotion.
Very numerous are the cases which might be cited to give a notion of dissolutive hysterical processes, as now observed with closer insight than formerly, in certain great hospitals. But, nevertheless, these hospital observations do not exhaust what has recently been learnt of hysteria. Dealing almost exclusively with a certain class of patients, they leave almost untouched another group, smaller, indeed, but equally instructive for our study.
Hysteria is no doubt a disease, but it is by no means on that account an indication of initial weakness of mind, any more than an Arctic explorer's frost-bite is an indication of bad circulation. Disease is a function of two variables: power of resistance and strength of injurious stimulus. In the case of hysteria, as in the case of frost-bite, the inborn power of resistance may be unusually great, and yet the stimulus may be so excessive that that power may be overcome. Arctic explorers have generally, of course, been among the most robust of men. And with some hysterics there is an even closer connection between initial strength and destructive malady. For it has often happened that the very feelings which we regard as characteristically civilised, characteristically honourable, have reached a pitch of vividness and delicacy which exposes their owners to shocks such as the selfish clown can never know. It would be a great mistake to suppose that all psychical upsets are due to vanity, to anger, to terror, to sexual passion. The instincts of personal cleanliness and of feminine modesty are responsible for many a breakdown of a sensitive, but not a relatively feeble organisation. The love of one's fellow-creatures and the love of God are responsible for many more. And why should it not be so? There exist for many men and women stimuli far stronger than self-esteem or bodily desires. Human life rests more and more upon ideas and emotions whose relation to the conservation of the race or of the individual is indirect and obscure. Feelings which may once have been utilitarian have developed wholly out of proportion to any advantage which they can gain for their possessor in the struggle for life. The dangers which are now most shudderingly felt are often no real risks to life or fortune. The aims most ardently pursued are often worse than useless for man regarded as a mere over-runner of the earth.
There is thus real psychological danger in fixing our conception of human character too low. Some essential lessons of a complex perturbation of personality are apt to be missed if we begin with the conviction that there is nothing before us but a study of decay. As I have more than once found need to maintain, it is his steady advance, and not his occasional regression, which makes the chief concern of man.
To this side of the study of hysteria Drs. Breuer and Freud have made valuable contribution. Drawing their patients not from hospital wards, but from private practice, they have had the good fortune to encounter, and the penetration to understand, some remarkable cases where unselfish but powerful passions have proved too much for the equilibrium of minds previously well-fortified both by principle and by education.[11]
"Wax to receive and marble to retain"; such, as we all have felt, is the human mind in moments of excitement which transcend its resistant powers. This may be for good or for evil, may tend to that radical change in ethical standpoint which is called conversion, or to the mere setting-up of some hysterical disability. Who shall say how far we desire to be susceptible to stimulus? Most rash would it be to assign any fixed limit, or to class as inferior those whose main difference from ourselves may be that they feel sincerely and passionately what we feel torpidly, or perhaps only affect to feel. "The term degenerate," says Dr. Milne Bramwell, "is applied so freely and widely by some modern authors that one cannot help concluding that they rank as such all who do not conform to some primitive, savage type, possessing an imperfectly developed nervous system." Our "degenerates" may sometimes be in truth progenerate; and their perturbation may mask an evolution which we or our children needs must traverse when they have shown the way.