So far from being animal-like, the human impulses of sex are among the least animal-like acquisitions of man. The human sphere of sex differs from the animal sphere of sex to a singularly great extent.[[59]] Breathing is an animal function and here we cannot compete with birds; locomotion is an animal function and here we cannot equal quadrupeds; we have made no notable advance in our circulatory, digestive, renal, or hepatic functions. Even as regards vision and hearing, there are many animals that are more keen-sighted than man, and many that are capable of hearing sounds that to him are inaudible. But there are no animals in whom the sexual instinct is so sensitive, so highly developed, so varied in its manifestations, so constantly alert, so capable of irradiating the highest and remotest parts of the organism. The sexual activities of man and woman belong not to that lower part of our nature which degrades us to the level of the "brute," but to the higher part which raises us towards all the finest activities and ideals we are capable of. It is true that it is chiefly in the mouths of a few ignorant and ill-bred women that we find sex referred to as "bestial" or "the animal part of our nature."[[60]] But since women are the mothers and teachers of the human race this is a piece of ignorance and ill-breeding which cannot be too swiftly eradicated.

There are some who seem to think that they have held the balance evenly, and finally stated the matter, if they admit that sexual love may be either beautiful or disgusting, and that either view is equally normal and legitimate. "Listen in turn," Tarde remarks, "to two men who, one cold, the other ardent, one chaste, the other in love, both equally educated and large-minded, are estimating the same thing: one judges as disgusting, odious, revolting, and bestial what the other judges to be delicious, exquisite, ineffable, divine. What, for one, is in Christian phraseology, an unforgivable sin, is, for the other, the state of true grace. Acts that for one seem a sad and occasional necessity, stains that must be carefully effaced by long intervals of continence, are for the other the golden nails from which all the rest of conduct and existence is suspended, the things that alone give human life its value."[[61]] Yet we may well doubt whether both these persons are "equally well-educated and broad-minded." The savage feels that sex is perilous, and he is right. But the person who feels that the sexual impulse is bad, or even low and vulgar, is an absurdity in the universe, an anomaly. He is like those persons in our insane asylums, who feel that the instinct of nutrition is evil and so proceed to starve themselves. They are alike spiritual outcasts in the universe whose children they are. It is another matter when a man declares that, personally, in his own case, he cherishes an ascetic ideal which leads him to restrain, so far as possible, either or both impulses. The man, who is sanely ascetic seeks a discipline which aids the ideal he has personally set before himself. He may still remain theoretically in harmony with the universe to which he belongs. But to pour contempt on the sexual life, to throw the veil of "impurity" over it, is, as Nietzsche declared, the unpardonable sin against the Holy Ghost of Life.

There are many who seek to conciliate prejudice and reason in their valuation of sex by drawing a sharp distinction between "lust" and "love," rejecting the one and accepting the other. It is quite proper to make such a distinction, but the manner in which it is made will by no means usually bear examination. We have to define what we mean by "lust" and what we mean by "love," and this is not easy if they are regarded as mutually exclusive. It is sometimes said that "lust" must be understood as meaning a reckless indulgence of the sexual impulse without regard to other considerations. So understood, we are quite safe in rejecting it. But that is an entirely arbitrary definition of the word. "Lust" is really a very ambiguous term; it is a good word that has changed its moral values, and therefore we need to define it very carefully before we venture to use it. Properly speaking, "lust" is an entirely colorless word[[62]] and merely means desire in general and sexual desire in particular; it corresponds to "hunger" or "thirst"; to use it in an offensive sense is much the same as though we should always assume that the word "hungry" had the offensive meaning of "greedy." The result has been that sensitive minds indignantly reject the term "lust" in connection with love.[[63]] In the early use of our language, "lust," "lusty," and "lustful" conveyed the sense of wholesome and normal sexual vigor; now, with the partial exception of "lusty," they have been so completely degraded to a lower sense that although it would be very convenient to restore them to their original and proper place, which still remains vacant, the attempt at such a restoration scarcely seems a hopeful task. We have so deeply poisoned the springs of feeling in these matters with mediæval ascetic crudities that all our words of sex tend soon to become bespattered with filth; we may pick them up from the mud into which they have fallen and seek to purify them, but to many eyes they will still seem dirty. One result of this tendency is that we have no simple, precise, natural word for the love of the sexes, and are compelled to fall back on the general term, which is so extensive in its range that in English and French and most of the other leading languages of Europe, it is equally correct to "love" God or to "love" eating.

Love, in the sexual sense, is, summarily considered, a synthesis of lust (in the primitive and uncolored sense of sexual emotion) and friendship. It is incorrect to apply the term "love" in the sexual sense to elementary and uncomplicated sexual desire; it is equally incorrect to apply it to any variety or combination of varieties of friendship. There can be no sexual love without lust; but, on the other hand, until the currents of lust in the organism have been so irradiated as to affect other parts of the psychic organism—at the least the affections and the social feelings—it is not yet sexual love. Lust, the specific sexual impulse, is indeed the primary and essential element in this synthesis, for it alone is adequate to the end of reproduction, not only in animals but in men. But it is not until lust is expanded and irradiated that it develops into the exquisite and enthralling flower of love. We may call to mind what happens among plants: on the one hand we have the lower organisms in which sex is carried on summarily and cryptogamically, never shedding any shower of gorgeous blossoms on the world, and on the other hand the higher plants among whom sex has become phanersgamous and expanded enormously into form and color and fragrance.

While "lust" is, of course, known all over the world, and there are everywhere words to designate it, "love" is not universally known, and in many languages there are no words for "love." The failures to find love are often remarkable and unexpected. We may find it where we least expect it. Sexual desire became idealized (as Sergi has pointed out) even by some animals, especially birds, for when a bird pines to death for the loss of its mate this cannot be due to the uncomplicated instinct of sex, but must involve the interweaving of that instinct with the other elements of life to a degree which is rare even among the most civilized men. Some savage races seem to have no fundamental notion of love, and (like the American Nahuas) no primary word for it, while, on the other hand, in Quichua, the language of the ancient Peruvians, there are nearly six hundred combinations of the verb munay, to love. Among some peoples love seems to be confined to the women. Letourneau (L'Evolution Littéraire, p. 529) points out that in various parts of the world women have taken a leading part in creating erotic poetry. It may be mentioned in this connection that suicide from erotic motives among primitive peoples occurs chiefly among women (Zeitschrift für Sozialwissenschaft, 1899, p. 578). Not a few savages possess love-poems, as, for instance, the Suahali (Velten, in his Prosa und Poesie der Suahali, devotes a section to love-poems reproduced in the Suahali language). D. G. Brinton, in an interesting paper on "The Conception of Love in Some American Languages" (Proceedings American Philosophical Society, vol. xxiii, p. 546, 1886) states that the words for love in these languages reveal four main ways of expressing the conception: (1) inarticulate cries of emotion; (2) assertions of sameness or similarity; (3) assertions of conjunction or union; (4) assertions of a wish, desire, a longing. Brinton adds that "these same notions are those which underlie the majority of the words of love in the great Aryan family of languages." The remarkable fact emerges, however, that the peoples of Aryan tongue were slow in developing their conception of sexual love. Brinton remarks that the American Mayas must be placed above the peoples of early Aryan culture, in that they possessed a radical word for the joy of love which was in significance purely psychical, referring strictly to a mental state, and neither to similarity nor desire. Even the Greeks were late in developing any ideal of sexual love. This has been well brought out by E. F. M. Benecke in his Antimachus of Colophon and the Position of Women in Greek Poetry, a book which contains some hazardous assertions, but is highly instructive from the present point of view. The Greek lyric poets wrote practically no love poems at all to women before Anacreon, and his were only written in old age. True love for the Greeks was nearly always homosexual. The Ionian lyric poets of early Greece regarded woman as only an instrument of pleasure and the founder of the family. Theognis compares marriage to cattle-breeding; Alcman, when he wishes to be complimentary to the Spartan girls, speaks of them as his "female boy-friends." Æschylus makes even a father assume that his daughters will misbehave if left to themselves. There is no sexual love in Sophocles, and in Euripides it is only the women who fall in love. Benecke concludes (p. 67) that in Greece sexual love, down to a comparatively later period, was looked down on, and held to be unworthy of public discussion and representation. It was in Magna Græcia rather than in Greece itself that men took interest in women, and it was not until the Alexandrian period, and notably in Asclepiades, Benecke maintains, that the love of women was regarded as a matter of life and death. Thereafter the conception of sexual love, in its romantic aspects, appears in European life. With the Celtic story of Tristram, as Gaston Paris remarks, it finally appears in the Christian European world of poetry as the chief point in human life, the great motive force of conduct.

Romantic love failed, however, to penetrate the masses in Europe. In the sixteenth century, or whenever it was that the ballad of "Glasgerion" was written, we see it is assumed that a churl's relation to his mistress is confined to the mere act of sexual intercourse; he fails to kiss her on arriving or departing; it is only the knight, the man of upper class, who would think of offering that tender civility. And at the present day in, for instance, the region between East Friesland and the Alps, Bloch states (Sexualleben unserer Zeit, p. 29), following E. H. Meyer, that the word "love" is unknown among the masses, and only its coarse counterpart recognized.

On the other side of the world, in Japan, sexual love seems to be in as great disrepute as it was in ancient Greece; thus Miss Tsuda, a Japanese head-mistress, and herself a Christian, remarks (as quoted by Mrs. Eraser in World's Work and Play, Dec., 1906): "That word 'love' has been hitherto a word unknown among our girls, in the foreign sense. Duty, submission, kindness—these were the sentiments which a girl was expected to bring to the husband who had been chosen for her—and many happy, harmonious marriages were the result. Now, your dear sentimental foreign women say to our girls: 'It is wicked to marry without love; the obedience to parents in such a case is an outrage against nature and Christianity. If you love a man you must sacrifice everything to marry him.'"

When, however, love is fully developed it becomes an enormously extended, highly complex emotion, and lust, even in the best sense of that word, becomes merely a coördinated element among many other elements. Herbert Spencer, in an interesting passage of his Principles of Psychology (Part IV, Ch. VIII), has analyzed love into as many as nine distinct and important elements: (1) the physical impulse of sex; (2) the feeling for beauty; (3) affection; (4) admiration and respect; (5) love of approbation; (6) self-esteem; (7) proprietary feeling; (8) extended liberty of action from the absence of personal barriers; (9) exaltation of the sympathies. "This passion," he concludes, "fuses into one immense aggregate most of the elementary excitations of which we are capable."

It is scarcely necessary to say that to define sexual love, or even to analyze its components, is by no means to explain its mystery. We seek to satisfy our intelligence by means of a coherent picture of love, but the gulf between that picture and the emotional reality must always be incommensurable and impassable. "There is no word more often pronounced than that of love," wrote Bonstetten many years ago, "yet there is no subject more mysterious. Of that which touches us most nearly we know least. We measure the march of the stars and we do not know how we love." And however expert we have become in detecting and analyzing the causes, the concomitants, and the results of love, we must still make the same confession to-day. We may, as some have done, attempt to explain love as a form of hunger and thirst, or as a force analogous to electricity, or as a kind of magnetism, or as a variety of chemical affinity, or as a vital tropism, but these explanations are nothing more than ways of expressing to ourselves the magnitude of the phenomenon we are in the presence of.