The subject of this chapter is quite different. It is the much-discussed, still unsolved, and perhaps insoluble problem of neutral states, states of indifference, free from any accompaniment, either pleasurable or painful. Do such exist? Both the affirmative and negative are maintained by good authorities; there is even a psychologist who seems to me to have adopted each thesis in turn.[[53]]
The question can only be entered on in two ways—by observation and by argument. Let us examine the results of these two methods.
1. Does the state of indifference exist as an observable fact? Bain is, among contemporary writers, the principal champion of this thesis, which has excited a lengthy discussion.[[54]] He does not pretend to affirm that there is a single state of feeling free from every agreeable or disagreeable element; but if these elements only exist as infinitesimal quantities, psychology need take no account of them. Pleasure and pain are clearly defined generic states; yet there is a practical interest in knowing whether any neutral conditions exist. Bain finds the type of these in cases of simple excitement, which may be accompanied either by pleasure or by pain, but remain distinct from either. The sensation of burning, the smell of asafœtida, the taste of aloes, these are modes of excitement which we call pain, because in them pain predominates. The noise of a mill, the confused murmur of a great city, are modes of excitement which may be called agreeable or disagreeable; but the excitement is the essential fact, the pleasure and pain are accidental.
Bain does not appear to me happy in most of the examples he has chosen. I quote some of them. The shock produced by surprise—but surprise is only a mitigated form of fear, and in nearly all cases instantaneously assumes a painful or pleasurable character. The state of expectation: “The intense objectivity of one’s looks when following a race, or a great surgical operation, is not, strictly speaking, unconsciousness, but a maximum of energy with a minimum of consciousness. It is rather a mode of indifference—more of an excitement than an affective state.” Here we may make the same comment; moreover, there is in expectation a feeling of effort which soon becomes fatigue, and, in most instances, expectation involves the anticipation of some event either desired or dreaded.
Those who do not attempt to prove the existence of neutral states by direct observation deduce them from general principles. Thus Sergi considers them as the necessary effect of determinate biological conditions. Pleasure and pain being the two fundamental forms—the two poles of the life of feeling, there must exist between them a neutral zone corresponding to a state of perfect adaptation. Pain is a state of consciousness revealing a conflict of the organism with exterior forces—a want of adaptation of one to the other; whence a loss of energy. Pleasure is a state of consciousness which makes it evident that the reaction of the organism is connected with external excitations, whence arises, by synergy, a heightening of vital activity. Indifference is the neutral state of consciousness showing a perfect adaptation of the organism to constant and variable intensities—in other words, excitations which neither increase nor diminish vital activity, but preserve it, produce a state of equilibrium and appeal to the consciousness neither as pleasure nor pain.[[55]] This hypothesis—viz., that at certain moments the sentient being neither loses nor gains, and that such is the substratum of the psychic state called neutral, seems to me extremely probable, but remains no more than a hypothesis.
Now let us question the psycho-physicists who have treated this subject according to their own special method, while coming to different conclusions. It is difficult to adopt a procedure more theoretical than theirs, or one better adapted to show the insufficiency of the intellectualist method in this domain of psychology. In truth, the subject treated by them is a special aspect of the problem, not its totality; they are inquiring whether, in the “transformation” of pleasure into pain, and vice versâ, there is, in the passage from one contrary to the other, a point of neutrality or indifference. Wundt graphically represents the phenomenon by a curve: the portion of this curve above the line of the abscissa has a positive value, and corresponds to the development of pleasure; the portion below corresponds to the development of pain, and has a negative value; the precise point where the curve cuts the line of the abscissa (to rise in the direction of pleasure or descend in that of pain) corresponds to neutrality or indifference. Lehmann, who, however, admits that weak sensations are neutral states, gives a curve rather different from that of Wundt. From an observation first made by Horwicz, and experiments conducted by Lehmann himself, it appears that, if one dips one’s finger into water whose temperature gradually rises from 35° to 50° Centigrade during a space of 2 minutes and 20 seconds, one feels first an agreeable warmth, then some slight, unpleasant prickings, then oscillations of intense prickings with moments of rest, and lastly, pain. His conclusion is contrary to Wundt’s, for he finds that the passage from pleasure to pain does not take place in a neutral state.[[56]]
Experiments are not to be despised; but as for the figure supposed to illustrate the phenomenon, it is merely misleading; this mathematical conception explains nothing. The assimilation of pleasure to a positive, and pain to a negative value, is quite arbitrary. Moreover, the passage from plus to minus quantities through zero is an operation which has its base in our faculty of abstraction, and for its materials abstract and homogeneous quantities. The different degrees of pleasure and pain are nothing of this sort. We do not even know if these two phenomena have a common foundation, if there is a common measure between the two, if they are not both irreducible, and we have no right to place, theoretically, a Nullpunkt at the point of transition from one to the other. The problem is one of a concrete order; it is a question of fact, whether soluble or not, which is put before us.
2. Let us now listen to those who refuse to admit states of indifference.
Every state of consciousness is a trinity in the theological sense: it is the knowledge of some exterior or interior event; it includes motor elements; it has a certain tone of feeling. We describe it as intellectual, motor, or emotional, according to the preponderance of one of these elements, not its exclusive existence. It is a well-known fact that the clearer a perception, the weaker is its tone of feeling, and the more intense an emotion, the more attenuated the intellectual element which has evoked it; but diminution is not equivalent to disappearance. If neutral states existed, one of the fundamental elements of psychic life would exist only in an intermittent form, and at some moments even cease to be.
Besides this, let us observe ourselves and interrogate our own consciousness. “Let us consider ourselves at one of those moments of calm and apparent indifference, when it seems as if nothing could move us, and our numbed sensibility remains, as it were, suspended between pleasure and pain. This deceptive appearance of insensibility and aridity always masks some more or less feeble sensations of ease or uneasiness, some more or less slight and confused sentiments of joy or grief which are none the less real for being in nowise vivid or exciting. Moreover, how could our sensibility fail to be, constantly, more or less impressed by so many general causes which, independent of particular causes, so constantly act upon us, at every instant of our life, and which, so to speak, ceaselessly besiege us, from within and from without?” Bouillier, the author of this passage (op. cit., chap. xi.), supports his assertions by citing the innumerable impressions which come from the internal organs, from the state of the air and sky, from light, from the most trivial incidents of common life.