Note to § 33. In his Physical Ethics, Mr. Alfred Barratt has expressed a view which here calls for notice. Postulating Evolution and its general laws, he refers to certain passages in the Principles of Psychology (1st Ed. Pt. III. ch. viii. pp. 395, sqq. cf. Pt. IV. ch. iv.) in which I have treated of the relation between irritation and contraction which "marks the dawn of sensitive life;" have pointed out that "the primordial tissue must be differently affected by contact with nutritive and with innutritive matters"—the two being for aquatic creatures respectively the soluble and the insoluble; and have argued that the contraction by which a protruded part of a rhizopod draws in a fragment of assimilable matter "is caused by a commencing absorption of the assimilable matter." Mr. Barratt, holding that consciousness "must be considered as an invariable property of animal life, and ultimately, in its elements, of the material universe" (p. 43), regards these responses of animal tissue to stimuli, as implying feeling of one or other kind. "Some kinds of impressed force," he says, "are followed by movements of retraction and withdrawal, others by such as secure a continuance of the impression. These two kinds of contraction are the phenomena and external marks of pain and pleasure respectively. Hence the tissue acts so as to secure pleasure and avoid pain by a law as truly physical and natural as that whereby a needle turns to the pole, or a tree to the light" (p. 52). Not without questioning that the raw material of consciousness is present even in undifferentiated protoplasm, and everywhere exists potentially in that Unknowable Power which, otherwise conditioned, is manifested in physical action (Prin. of Psy., § 272–3), I demur to the conclusion that it at first exists under the forms of pleasure and pain. These, I conceive, arise, as the more special feelings do, by a compounding of the ultimate elements of consciousness (Prin. of Psy., §§ 60, 61): being, indeed, general aspects of these more special feelings when they reach certain intensities. Considering that even in creatures which have developed nervous systems, a great part of the vital processes are carried on by unconscious reflex actions, I see no propriety in assuming the existence of what we understand by consciousness in creatures not only devoid of nervous systems but devoid of structures in general.
Note to § 36. More than once in the Emotions and the Will, Dr. Bain insists on the connection between pleasure and exaltation of vitality, and the connection between pain and depression of vitality. As above shown, I concur in the view taken by him; which is, indeed, put beyond dispute by general experience as well as by the more special experience of medical men.
When, however, from the invigorating and relaxing effects of pleasure and pain respectively, Dr. Bain derives the original tendencies to persist in acts which give pleasure and to desist from those which give pain, I find myself unable to go with him. He says: "We suppose movements spontaneously begun, and accidentally causing pleasure; we then assume that with the pleasure there will be an increase of vital energy, in which increase the fortunate movements will share, and thereby increase the pleasure. Or, on the other hand, we suppose the spontaneous movements to give pain, and assume that, with the pain, there will be a decrease of energy, extending to the movements that cause the evil, and thereby providing a remedy" (3d Ed. p. 315). This interpretation, implying that "the fortunate movements" merely share in the effects of augmented vital energy caused by the pleasure, does not seem to me congruous with observation. The truth appears rather to be that though there is a concomitant general increase of muscular tone, the muscles specially excited are those which, by their increased contraction, conduce to increased pleasure. Conversely, the implication that desistance from spontaneous movements which cause pain, is due to a general muscular relaxation shared in by the muscles causing these particular movements, seems to me at variance with the fact that the retractation commonly takes the form not of a passive lapse but of an active withdrawal. Further, it may be remarked that depressing as pain eventually is to the system at large, we cannot say that it at once depresses the muscular energies. Not simply, as Dr. Bain admits, does an acute smart produce spasmodic movements, but pains of all kinds, both sensational and emotional, stimulate the muscles (Essays, 1st series, p. 360, 1, or 2d ed. Vol. I. p. 211, 12). Pain, however (and also pleasure when very intense), simultaneously has an inhibitory effect on all the reflex actions; and as the vital functions in general are carried on by reflex actions, this inhibition, increasing with the intensity of the pain, proportionately depresses the vital functions. Arrest of the heart's action and fainting is an extreme result of this inhibition; and the viscera at large feel its effects in degrees proportioned to the degrees of pain. Pain, therefore, while directly causing a discharge of muscular energy as pleasure does, eventually lowers muscular power by lowering those vital processes on which the supply of energy depends. Hence we cannot, I think, ascribe the prompt desistance from muscular movements causing pain, to decrease in the flow of energy; for this decrease is felt only after an interval. Conversely, we cannot ascribe the persistence in a muscular act which yields pleasure to the resulting exaltation of energy; but must, as indicated in § 33, ascribe it to the establishment of lines of discharge between the place of pleasurable stimulation and those contractile structures which maintain and increase the act causing the stimulation—connections allied with the reflex, into which they pass by insensible gradations.
[CHAPTER VII.]
THE PSYCHOLOGICAL VIEW.
§ 40. The last chapter, in so far as it dealt with feelings in their relations to conduct, recognized only their physiological aspects: their psychological aspects were passed over. In this chapter, conversely, we are not concerned with the constitutional connections between feelings, as incentives or deterrents, and physical benefits to be gained, or mischiefs to be avoided; nor with the reactive effects of feelings on the state of the organism, as fitting or unfitting it for future action. Here we have to consider represented pleasures and pains, sensational and emotional, as constituting deliberate motives—as forming factors in the conscious adjustments of acts to ends.
§ 41. The rudimentary psychical act, not yet differentiated from a physical act, implies an excitation and a motion. In a creature of low type the touch of food excites prehension. In a somewhat higher creature the odor from nutritive matter sets up motion of the body toward the matter. And where rudimentary vision exists, sudden obscuration of light, implying the passage of something large, causes convulsive muscular movements which mostly carry the body away from the source of danger. In each of these cases we may distinguish four factors. There is (a) that property of the external object which primarily affects the organism—the taste, smell, or opacity; and connected with such property there is in the external object that character (b) which renders seizure of it, or escape from it, beneficial. Within the organism there is (c) the impression or sensation which the property (a) produces, serving as stimulus; and there is connected with it, the motor change (d) by which seizure or escape is effected.
Now Psychology is chiefly concerned with the connection between the relation a b, and the relation c d, under all those forms which they assume in the course of evolution. Each of the factors, and each of the relations, grows more involved as organization advances. Instead of being single, the identifying attribute a, often becomes, in the environment of a superior animal, a cluster of attributes; such as the size, form, colors, motions, displayed by a distant creature that is dangerous. The factor b, with which this combination of attributes is associated, becomes the congeries of characters, powers, habits, which constitute it an enemy. Of the subjective factors, c becomes a complicated set of visual sensations co-ordinated with one another and with the ideas and feelings established by experience of such enemies, and constituting the motive to escape; while d becomes the intricate and often prolonged series of runs, leaps, doubles, dives, etc., made in eluding the enemy.
In human life we find the same four outer and inner factors, still more multiform and entangled in their compositions and connections. The entire assemblage of physical attributes a, presented by an estate that is advertised for sale, passes enumeration; and the assemblage of various utilities, b, going along with these attributes, is also beyond brief specification. The perceptions and ideas, likes and dislikes, c, set up by the aspect of the estate, and which, compounded and recompounded, eventually form the motive for buying it, make a whole too large and complex for description; and the transactions, legal, pecuniary, and other, gone through in making the purchase and taking possession, are scarcely less numerous and elaborate.
Nor must we overlook the fact that as evolution progresses, not only do the factors increase in complexity, but also the relations among them. Originally, a is directly and simply connected with b, while c is directly and simply connected with d. But eventually, the connections between a and b, and between c and d, become very indirect and involved. On the one hand, as the first illustration shows us, sapidity and nutritiveness are closely bound together; as are also the stimulation caused by the one and the contraction which utilizes the other. But, as we see in the last illustration, the connection between the visible traits of an estate and those characters which constitute its value, is at once remote and complicated; while the transition from the purchaser's highly composite motive to the numerous actions of sensory and motor organs, severally intricate, which effect the purchase, is through an entangled plexus of thoughts and feelings constituting his decision.