The poignancy of music depends upon just this fact that through it we get a revelation of ourselves to ourselves. In the other arts, this revelation is indirect, occurring through the representation of the lives of other, real or fictitious, personalities; but in music, it is direct; for there the object of expression is oneself. Even in the lyric poem, where the reader and the poet tend to become identical, the unity is less complete; for when embodied in words, feelings become more exterior than when put forth into tones; a tone is closer to the self, because like a cry or a laugh, it is less articulate. Moreover, words are means of communication as well as expression; they therefore embody of any experience only as much as can be passed from speaker to hearer; the unique is for the most part lost on the way; but in music the full personal resonance of experience is retained. In music we get so close to ourselves that at times it is almost frightening.

And this is the reason why, on all the high or serious occasions of human life, music is alone adequate to express its inner meaning. At a marriage or a funeral, in church or at a festival, the ceremonial is traditional and social; it expresses the historical and group significance of the situation, but not that which is unique and just one's own; it always contains, moreover, much that is outgrown and unacceptable—a creed of life or love or death that belongs to the past, not to us. But the music embodies all that we really believe and feel about the fact, its intimate, emotional essence, clear of everything irrelevant and external.

But music does more than express the inexpressible in ourselves; it gives us entrance into a supernatural world of feeling. Except at the rare high moments of our lives, its joys and despairs are too exalted for us; they are not ours; they belong to gods and heroes. In music the superman is born into our feelings. Music does for the emotions what mythology and poetry do for the imagination and philosophy for the intellect—it brings us into touch with a more magnificent life, for which we have perhaps the potency, but not the opportunity here. And in doing this, music performs a great service; for, outside of love and war, life, which offers endless occasions for intense thought and action, provides few for passionate feeling.

Thus far our study of the art has been confined to so-called absolute music. We must now complete our survey by a rapid consideration of the union of music with the other arts. Because of its abstractness, music, of all the arts, lends itself most readily to combination with others; yet even in the case of music the possibility of union is limited by the existence of a clear identity between the arts combined. Thus, music goes well with the temporal arts, poetry, the dance, and the drama, and particularly well with the first two because they are rhythmical; it will also unite with architecture, because that is another abstract art; but with the static, concrete arts like painting and sculpture, it will not fuse. One might perhaps accompany a picture with a single chord whose emotional meaning was the same as that of the color scheme and the objects represented, but not with more; for the aesthetic experience of the picture is instantaneous and complete, while that of the music requires time for its development and fruition; hence the two would soon fall apart, and a person would either have to ignore the music or cease to look at the picture.

Originally, of course, music was always combined with some other art, and first of all, probably with the dance. In its earliest form, the dance was a communal religious expression, about which we shall have little to say, since it belongs to the past, not to living art. For to-day the dance is a free art like music. The beauty of the dance consists, first, in the free and rhythmical expression of impulses to movement. This expression, which is direct for the dancer who actually carries out her impulses in real motion, is for the spectator indirect and ideal, for he experiences only movement-images aroused by movements seen, and then, by feeling these into the limbs of the dancer, dances with her in the imagination. And to secure this free and large, even though vicarious, expression of pent-up impulses to movement is very grateful to us whose whole movement life is impoverished, because restricted by convention and occupation to a few narrow types. But the dance would have little interest for men were it not for another element in its beauty: the expression of the amorous feelings of the spectator. These, although really located in the breast of the spectator, are nevertheless embodied in the personality of the dancer, whose charm they constitute. Finally, the content of the dance may be further enriched through the use of symbolic costume and mimetic gestures, suggesting emotions like joy or love or grief, emotionally toned ideas like spring, or actions such as courtship. Now music, with its own rhythmical order and voluminous emotional content, has an obvious kinship with the rhythmic form and amorous substance of the dance, and so can well serve to accompany it.

The result of the union is to enforce the rhythmic experience through the medium of sound, the dance keeping time with the music, and, through the heightened emotional tone and increased suggestibility created by the music, to deepen the sympathetic rapport between dancer and spectator. Thus the music is given a concrete interpretation through the dance, and the dance gains in emotional power through the music. In the union, the gain to the dance is clear and absolute; but the music pays a price for the concreteness of content which it secures, by forfeiting its power to express chance inner moods—what it gains in definiteness it loses in scope and universality. And only music with a strong and evident rhythm is capable of union with the dance; the more complex and subtle music, aside from the impossibility of making its delicate rhythms fit into those of a dance, has a variety and sublimity of meaning so far transcending the personality of any human being, that to attempt to focus it in a dancer, no matter how charming, would be a travesty.

Of equal naturalness and almost equal antiquity with the union of music with the dance, is its union with poetry. In song this union is a real fusion; for the tones are the vocal word-sounds themselves, purified into music. Here, of course, unlike absolute music, the tones are expressive, not only as other tones are through their mere sound, but also through their meaning. And this can well be; for as Schopenhauer remarked, just as the universal may be illustrated by any object which embodies it, so the vague musical content of a tone may be fused with the concrete meaning of a word of like feeling. And for many hearers music doubtless gains by thus becoming articulate; for, being unable to supply out of their own imagination the concreteness which music lacks, they welcome having this done for them by the poet; yet the gain is not without a corresponding loss. For when the musical meaning is specialized through the emotions that are the burden of the song, it necessarily loses the power which it would otherwise have of expressing one's own inner life—once more, what it gains in definiteness it loses in scope. It no longer possesses the unique function of the musical. Hence, if we love the music, we shall not care whether or not we understand the meaning of the words, and what we shall value in the song will be only the peculiar intimacy which it derives from its instrument, the voice. Only rarely is it otherwise, as in some of the songs of Schumann, when the poetic interpretation is so beautiful and so completely at one with the musical feeling, that we prefer to accept it rather than substitute our own interpretation for the poet's. But even so, the music, if genuine, will have value without the words. At the opposite pole are those songs, often popular, where the music, having little worth in itself, is a mere accompaniment for the words. In all cases, however, the music can lend to the poetry some of the intimacy which is its own, so that its burden has a deeper echo in the soul.

Yet much of poetry is unfit for union with music. This is true, first, of all highly intellectual poetry, where the emotions are embodied in complex and abstract ideas. One could not, for example, readily set Browning to music. Music may be deep, mystic, even metaphysical in its meaning, but it cannot be dialectical. The emotions that accompany subtle thought, even when intense, are not of the voluminous, massive kind which music expresses; they lack the bodily resonance of the latter; they are, moreover, clean-cut and static, while in music everything flows in half-lights, like a river moving in moonlight. On the other hand, poems which express rapidly developing states of mind, which contain quick, subtle transitions, are equally unfit for union with music. For music, although always in motion, is always in slow motion; it needs time to get under way, and time for its development in embroidering, varying, and repeating its theme. And this difficulty applies in a general way to every union between poetry and music. For words are primarily practical and communicative, and therefore cut short the passion which they express; whereas tones, never having had any other purpose than expression, draw it out and let it have its way. Moreover, poetry, because of its definiteness, is compatible with only a limited range of variation, beyond which it becomes monotonous, while music, because of its abstractness, permits of variations almost endless, and is enriched by every new shape in which its meaning can appear. If, therefore, poetry is to keep time with the slow movement of the music and conform to its mode of development, the verses have to be repeated again and again; but this destroys the poetic form—as in the oratorio, with its senseless iterations.

Finally, the temporal and developmental character of the drama would seem to fit it for union with music. Yet the union of these two arts is confronted with the same difficulties that beset the connection between poetry and music. The movement of the acting drama is swift and straight, that of music is slow and circular; hence if the music is to have its way, the action of the drama must stand. In consequence of this, there is little real action in most operas, prolonged dialogues in song taking its place. Only rarely—as for example in Strauss' "Salome," perhaps—is the form of the drama preserved. As a rule the unity of the musical form is also destroyed, the thread of the story being substituted for it. Last, as in the song, the universality of the music is renounced in favor of the interpretation given to it by the program. In the leit-motif, indeed, as Wagner uses it, where a musical phrase is provided with a fixed connotation of ideas and acts which is understood by the hearer whenever it recurs, opera ceases to be music at all in the strict sense, and becomes a musical language. Yet in the opera, as in the song, the music, when genuine, possesses its own independent meaning, which can be appreciated without the mise en scene or the program. And then only rarely, as in the Toreador song in "Carmen," is the action so close to the inner meaning of the music, that the latter seems to gain by the interpretation.

It follows that Wagner's dream of making the opera a sum of all the values of poetry, drama, and music, and so an art more beautiful than any one of them, is fallacious. For, as we have repeatedly seen, in uniting the arts, there is gain as well as loss; something of the form or meaning of each has to be sacrificed. The work that results from the combination is really a new art-form, in which the elements are changed and their individuality partly destroyed; and its value is a new value, which may be equal to, but is certainly no greater than, that of any other art-form. To put the matter epigrammatically, when the arts are added together, one plus one does not equal two, but only one again.