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58. It is only by holding fast to such a conception that we can escape the many difficulties and contradictions presented by unconscious phenomena, and explain many physiological and psychological processes. Descartes—followed by many philosophers—identified Consciousness with Thought. To this day we constantly hear that to have a sensation, and to be conscious of it, is one and the same state; which is only admissible on the understanding that Consciousness means Sentience, and Sentience the activity of the nervous system viewed subjectively. Leibnitz pointed out that we have many psychical states which are unconscious states—to have an idea and be conscious of it, are, he said, not one but two states. The Consciousness by Descartes erected into an essential condition of Thought, was by Leibnitz reduced to an accompaniment which not only may be absent, but in the vast majority of cases is absent. The teaching of most modern psychologists is that Consciousness forms but a small item in the total of psychical processes. Unconscious sensations, ideas, and judgments are made to play a great part in their explanations. It is very certain that in every conscious volition—every act that is so characterized—the larger part of it is quite unconscious. It is equally certain that in every perception there are unconscious processes of reproduction and inference—there is much that is implicit, some of which cannot be made explicit—a “middle distance” of sub-consciousness, and a “background” of unconsciousness. But, throughout, the processes are those of Sentience.
59. Unconsciousness is by some writers called latent Consciousness. Experiences which are no longer manifested are said to be stored up in Memory, remaining in the Soul’s picture-gallery, visible directly the shutters are opened. We are not conscious of these feelings, yet they exist as latent feelings, and become salient through association. As a metaphorical expression of the familiar facts of Memory this may pass; but it has been converted from a metaphor into an hypothesis, and we are supposed to have feelings and ideas, when in fact we have nothing more than a modified disposition of the organism—temporary or permanent—which when stimulated will respond in this modified manner. The modification of the organism when permanent becomes hereditary; and its response is then called an instinctive or automatic action. And as actions pass by degrees from conscious and voluntary into sub-conscious and sub-voluntary, and finally into unconscious and involuntary, we call them volitional, secondarily automatic, and automatic. If any one likes to say the last are due to latent consciousness, I shall not object. I only point to the fact that the differences here specified are simply differences of degree—all the actions are those of the sentient organism.
60. Picture to yourself this sentient organism incessantly stimulated from without and from within, and adjusting itself in response to such stimulations. In the blending of stimulations, modifying and arresting each other, there is a fluctuating “composition of forces,” with ever-varying resultants. Besides the stream of direct stimulations, there is a wider stream of indirect or reproduced stimulations. Together with the present sensation there is always a more or less complex group of revived sensations, the one group of neural tremors being organically stimulated by the other. An isolated excitation is impossible in a continuous nervous tissue; an isolated feeling is impossible in the consensus or unity of the sentient organism. The term Soul is the personification of this complex of present and revived feelings, and is the substratum of Consciousness (in the general sense), all the particular feelings being its states. To repeat an illustration used in my first volume, we may compare Consciousness to a mass of stationary waves. If the surface of a lake be set in motion each wave diffuses itself over the whole surface, and finally reaches the shores, whence it is reflected back towards the centre of the lake. This reflected wave is met by the fresh incoming waves, there is a blending of the waves, and their product is a pattern on the surface. This pattern of stationary waves is a fluctuating pattern, because of the incessant arrival of fresh waves, incoming and reflected. Whenever a fresh stream enters the lake (i. e. a new sensation is excited from without), its waves will at first pass over the pattern, neither disturbing it nor being disturbed by it; but after reaching the shore the waves will be reflected back towards the centre, and there will more or less modify the pattern.
VOLUNTARY AND INVOLUNTARY ACTIONS.
61. Much of what has been said in the preceding chapter respecting the passive side of the organism is equally applicable to the active side. Our actions are classed as voluntary and involuntary mainly in reference to their being consciously or unconsciously performed; but not wholly so, for there are many involuntary actions of which we are distinctly conscious, and many voluntary actions of which we are at times sub-conscious and unconscious. I do not propose here to open the long and arduous discussion as to what constitutes Volition, my present purpose being simply that of fixing the meaning of terms, so that the question of Automatism may not be complicated by their ambiguities. “Voluntary” and “involuntary” are, like “conscious” and “unconscious,” correlative terms; but commonly, instead of being understood as indicating differences of degree in phenomena of the same order, they are supposed to indicate differences of kind—a new agent, the Will, being understood in the one case to direct the Mechanism which suffices without direction in the other.
62. This interpretation is unphysiological and unpsychological, since it overlooks the fact that both voluntary and involuntary actions belong to the same order of phenomena, i. e. those of the sentient organism. Both involve the same efficient cause, i. e. co-operant conditions. We draw a line of demarcation between the two abstractions—as between all abstractions—but the concrete processes they symbolize have no such demarcation. Just as the thought which at one moment passes unconsciously, at another consciously, is in itself the same thought, and the same neural process; so the action which at one moment is voluntary, and at another involuntary, is itself the same action, performed by the same mechanism. The incitation which precedes, and the feeling which accompanies the action, belong to the accessory mechanisms, and may be replaced by other incitations and other feelings; as the fall of an apple is the same event, involving the same conditions, i. e. efficient cause, whether the occasional cause be a gust of wind or the gardener’s scissors, and whether the fall be seen and heard or not. I may utter words intentionally and consciously, and I may utter the same words automatically, unconsciously; I may wink voluntarily, and wink involuntarily. There are terms to express these differences; but they do not express a difference in the efficient agencies.
63. Many writers seem to think that the involuntary actions belong to the physical mechanical order, because they are not stimulated by cerebral incitations, and cannot be regulated or controlled by such incitations—or as the psychologists would say, because Consciousness in the form of Will is no agent prompting and regulating such actions. But I think this untenable. The actions cannot belong to the mechanical order so long as they are the actions of a vital mechanism, and so long as we admit the broad distinction between organisms and anorganisms. Whether they have the special character of Consciousness or not, they have the general character of sentient actions, being those of a sentient mechanism. And this becomes the more evident when we consider the gradations of the phenomena. Many, if not all, of those actions which are classed under the involuntary were originally of the voluntary class—either in the individual or his ancestors; but having become permanently organized dispositions—the pathways of stimulation and reaction having been definitely established—they have lost that volitional element (of hesitation and choice) which implies regulation and control. But even here a slight change in the habitual conditions will introduce a disturbance in the process which may awaken Consciousness, and the sense of effort, sometimes even causing control. An instinctive or an automatic action may be thus changed, or arrested. Take as an example one of the unequivocally automatic actions, that of Breathing. It is called automatic because, like the actions of an automaton, it is performed by a definitely constructed mechanism, always working in the same way when stimulated and left to itself. There must of course be a sense of effort in every impulse which has resistance to overcome, organs to be moved; but the mechanism of Breathing is so delicately adjusted, that the sense of effort is reduced to a minimum, and we are unconscious of it, or sub-conscious of it. Nevertheless, without altering the rate or amplitude of the inspirations and expirations, we become distinctly conscious of them, and, moreover, within certain limits we can control them, so that the Breathing passes from the involuntary to the voluntary class.
64. Pass on to other examples. What action can be more involuntary than the rhythmic movements of the heart and the contractions of the iris? Compared with the actions of the tongue or limbs, these seem riveted by an iron necessity, freed from all consciousness and control. Yet the movements of the heart are not only stimulated by sensations and thoughts, they are also capable of being felt; and the movements both of heart and iris are not wholly removed from our control. That we do not habitually control (that is, interfere with) the action of the heart, the contraction of the iris, or the activity of a gland, is true; it is on this account that such actions are called involuntary; they obey the immediate stimulus. But it is an error to assert that these actions cannot be controlled, that they are altogether beyond the interference of other centres, and cannot by any effort of ours be modified. It is an error to suppose these actions are essentially distinguished from the voluntary movement of the hands. We have acquired a power of definite direction in the movements of the hands, which renders them obedient to our will; but this acquisition has been of slow laborious growth. If we
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