But these influences of environment bring us back, indirectly, to our original cause; for manners, customs, traditions, institutions, all these are ideas which, with their accompanying feelings, have fixed and incarnated themselves in certain acts serving as starting-points for a new stage in evolution.

Nevertheless, the preceding statements cannot be admitted without qualification. We have stated it as a law that the intellectual development involves the evolution of the feelings; but this rule is not absolute, and should be taken with important reservations. In the first place, these two forms of evolution rarely advance pari passu. Not to mention the cases in which ideas remain completely ineffectual and abortive, and produce no movement, their action, in general, is only felt in the long run, and emotional evolution is retarded. In the second place, there are certain cases where the evolution of feelings is direct, and precedes that of ideas.

The philosophical historian, Buckle, in his study of the factors of civilisation, points out two as essential—intellectual progress and moral progress; after which he puts to himself what he calls a very grave question: which of these two is the more important, and dominant over the other? He is decisive in choosing the first. Buckle’s question is in great part ours; for, though not comprehending all the manifestations of the emotional life, the moral sentiments form at least a very important fraction of it. His answer seems to me a legitimate one; but he was too much imbued with the notion that it is sufficient for an idea to be true and clearly conceived to make it an incentive to action; and he seems never to suspect that an idea can only supplant a feeling on condition of becoming a feeling itself.[[125]]

The intellect is capable of instantaneously finding out a new truth, or recognising an idea as just and conformable to the nature of things; but all this remains in a theoretic condition—i.e., without emotional colouring or tendency to realise itself. That which is discovered so rapidly by means of logic, takes years, or even centuries, to become a motive for action. “If the Greeks were unable to extend their feelings of humanity so as to include the barbarians, the cause lay, not in intellectual insufficiency, but in the arrestive power of their national feeling. Christianity overthrew these barriers, not by means of intellectual reflection, but by the effect of an acute and deeply-seated feeling. Afterwards, within the limits of Christianity, intolerance raised new barriers, and fettered the natural development of religion.”[[126]] We might find in history numerous examples of this inertia of the feelings, as in the case of slavery, etc. We imagine the emotions as in a state of perpetual motion and instability, whilst a habitual manner of feeling, in fact, possesses a formidable arrestive power, only gradually lost under the influence of time. It is a common saying that an argument has never changed a conviction; but this is only the case if we regard the present; it can act by incubation and at a great distance of time.

Another reason for disagreement between the two modes of development, the intellectual and the emotional, may be expressed under a form which, though rather pedantic, is clear and precise. Intellectual evolution is subject to the principle of contradiction, emotional evolution is not; it is, indeed, subject to a logical principle to be determined later, but the principle is another. Let us suppose a purely intellectual being: affirmations and negations regarding the same object cannot co-exist in his brain; one eliminates the other. If we suppose a purely emotional being it will be found that two opposite tendencies can be simultaneously active in him, each working towards its own end, provided that they do not bring about the destruction of the individual. In every individual who contradicts himself there is, at the moment when he contradicts himself, an emotional element at work. We shall see later on that this is the key to all contradictory characters, which are quite natural from the emotional point of view, though they are the stumbling-blocks of the intellect.

Finally, in certain cases the emotional development is completely detached from the other, and even in advance of it; this is direct evolution. Feeling, as has been said, is the pioneer of knowledge—i.e., it sometimes involves a confused knowledge; it is the anticipation of an ideal. In this case it is not an idea which excites a feeling, but the development of a feeling which ends by taking concrete form in an idea; its source is in the temperament and the character. The theory of evolution has familiarised us with the notion of spontaneous variations in animals and plants. This phenomenon is also found in psychology—in the intellectual order, in the emotional order, in the order of action. We are too much inclined to believe that inventors, revealers, initiators, exist only in the region of knowledge or activity; but in the region of feeling, too, there are spontaneous variations, both serviceable and injurious. If there are original ways of thinking, there are also original ways of feeling, which impose themselves on others, create a contagion. We shall find examples of this in abundance, for these “variations” have played a great part, especially in the evolution of the moral sentiment.

These remarks are of too general a character, but will be supplemented later on, when we come to study each form of emotion in its turn. Such is the object of our second part. It will consist of a series of monographs of varying length. Except for a general survey of the law which seems to govern the dissolution of the feelings, their pathology will not be treated in a special section, but will be distributed throughout the work, terminating the study of each normal form, but only in such measure as will serve to render their nature more comprehensible, in which case it partakes of the character of psychology.

II.

Before setting out on our journey we must map out our route. At the beginning of this work I presented the reader with a general survey of the emotional life; it will be necessary to return to this subject in a briefer, more precise, and more limited manner. Since complex emotions are derived from simple emotions, and the latter from needs and instincts, whether satisfied or thwarted, from tendencies which are the direct and immediate expression of our physical and mental constitution; since the irreducible element is a motor phenomenon, actual or virtual, realised or in a nascent condition, it is indispensable to draw up a list of those primitive tendencies or instincts which are the roots of emotion.

On this point we have very little clear knowledge. Some writers do not notice it at all; others content themselves with a haphazard enumeration. W. James, who has seriously occupied himself with the question, lays down the principle that man has as many instincts as the animals, and even more, which seems to me indisputable. But his list, which he closes by saying that some will find it too long and others too short, contains very heterogeneous elements: instincts which are certainly primitive, derived instincts (as the love of possession), instincts whose existence as such is disputed (as imitation), pathological instincts (as the phobias or pathological fears, kleptomania, etc.), which last can only be considered anomalous, and, therefore, very different from simple and indecomposable instincts.[[127]]