Under favorable conditions, however, all sensations may enter into the sthetic experience. Despite the close connection between the lower senses and the impulses serving practical life, there is a certain disinterestedness in all pleasant sensations. Fine wines and perfumes offer tastes and odors which are sought and enjoyed apart from the satisfaction of hunger; in dancing, movement sensations are enjoyed for their own sake; in the bath, heat and cold. But, as we have seen, it is not sufficient for a sensation to be free from practical ends in order to become aesthetic; it must be connected with the larger background of feeling; it must be expressive. Now, under certain circumstances and in particular cases, this may occur, even in the instance of the lower senses. The perfume of flowers, of roses and of violets, has a strong emotional appeal; it is their "soul" as the poets say. The odor of incense in a cathedral may be an important element in devotion, fusing with the music and the architecture. Or recall the odor of wet earth and reviving vegetation during a walk in the woods on a spring morning. Even sensations of taste may become aesthetic. An oft-cited example is the taste of wine on a Rhine steamer. Guyau, the French poet-philosopher, mentions the taste of milk after a hard climb in the Pyrenees. [Footnote: Les Problemes de l'esthetique contemporaine, 8me edition, p. 63.] A drink of water from a clear spring would serve equally well as an example familiar to all. The warmth of a fire, of sunlight, of a cozy room, or the cold of a star-lit winter night have an emotional significance almost, if not quite, equal to that of the visual sensations from these objects. Touch seems to be irretrievably bound up with grasping and using, but the touch of a well-loved person may be a free and glowing experience, sharing with sight in beauty. The movement sensations during a run in the open air or in dancing are not only free from all practical purpose, but are elements in the total animation. And other examples will come to the mind of every reader. [Footnote: Compare Volkelt: System der Aesthetik, Bd. I, Zweites Capitel, S. 92.]

As our illustrations show, the lower senses enter into the beauty of nature only; they do not enter into the beauty of art. Their beauty is therefore vague and accidental. It usually depends, moreover, upon some support from vision, with the beauty of which it fuses. Apart from the picturesque surroundings seen, the mountain milk and the Rhine wine would lose much of their beauty; the warmth of sunlight or of fire, without the brightness of these objects, the odor of flowers without their form and color, would be of small aesthetic worth. Through connection with vision the lower senses acquire something of its permanence and independence. People differ greatly in their capacity to render the lower senses aesthetic; it is essentially a matter of refinement, of power to free them from their natural root in the practical and instinctive, and lift them into the higher region of sentiment. But every kind of sensation, however low, may become beautiful; this is not to degrade beauty, but to ennoble sensation.

From a psychological standpoint, sensation is the datum of the aesthetic experience, the first thing there, while its power to express depends upon a further process which links it up with thoughts and feelings. We must inquire, therefore, how this linkage takes place—how, for example, it comes about that the colors of a painting are something more than mere colors, being, in addition, embodiments of trees and sky and foliage, and of liveliness and gayety and other feelings appropriate to a spring landscape. Let us consider the linkage with feeling first.

There are two characteristics of aesthetic feeling in its relation to sensations and ideas which must be taken into account in any explanation; its objectification in them and the universality of this connection. Expression is embodiment. We find gayety in the colors of the painting, joy in the musical tones, happiness in the pictured face, tenderness in the sculptured pose. We hear the feeling in the sounds and see it in the lines and colors. The happiness seems to belong to the face, the joy to the tones, in the same simple and direct fashion as the shape of the one or the pitch of the others. The feelings have become true attributes. It is only by analysis that we pick them out, separate them from the other elements of idea or sensation in the whole, and then, for the purpose of scientific explanation, inquire how they came to be connected. And this connection is not one that depends upon the accidents of personal experience. It is not, for example, like the emotional significance that the sound of the voice of the loved one has for the lover, which even he may some day cease to feel, and which other men do not feel at all. It is rather typified by the emotional value of a melody, which, through psychological processes common to all men, becomes a universal language of feeling. The work of art is a communicable, not a private expression.

As we have observed, the elements of feeling in the aesthetic experience are of two broad kinds—either vague, when directly linked with the sensuous medium, or else definite, when this linkage is mediated by ideas through which the medium is given content and meaning. The former kind, which I shall consider first, comprises all cases of the emotional expressiveness of the medium itself,—of tones and word-sounds and their rhythms and patterns, of colors and lines and space-forms and their designs. The detailed study of this expressiveness I shall leave to the chapters on the arts; here I wish merely to indicate the kind of psychological process involved.

In many cases the psychological principle of association operates. The tender expressiveness of certain curved lines, like those of the Greek amphora, for example, is due, partially at least, to association with lines of the human body, with which normally this feeling is associated. The associated object, together with its feeling tone, are sufficiently common to the experience of all men to account for the universality of the emotion, and the isolation of the stimulus—abstract line—from its usual context of color and bulk accounts for the vagueness. Sometimes, on the other hand, expressiveness seems to be due to a direct psychological relation between the sense-stimulus and the emotion. This is almost certainly the case with rhythms, and, as I shall argue in the chapters on painting and music, is at least partially true of colors and tones. The expressiveness is at once too immediate and too universal to depend upon association with definite things and events, or personal, emotional crises. A rhythm, for example, may be exciting the first time it is heard; one does not have to wait to hear it at a battle-charge; a melody may be sad even when one has never heard it sung by chance at parting. Of course the fact that associations are not remembered is no proof that they do not operate; but it is difficult to conceive of any which could operate in these cases. For this reason, I think, we must suppose that certain sense-stimuli and combinations of stimuli not only produce in the sensory areas of the brain the appropriate sensations, but that their effects are prolonged, overflowing into the motor channels and there causing a total reaction of the organism, the conscious aspect of which is a vague feeling. The organic resonance is too slight and diffuse to produce a true emotion; hence only a mood results.

In all the representative arts the vague expressiveness of the medium is reinforced through emotions aroused by ideas which interpret sensation as an element of a thing. The green in the painting is not only green, but green of the sea; the red is not only red, but red of the sky; the curved line is not a mere curve, it is the outline of a wave. The totality of colors and lines is not a mere color and line composition, but a marine landscape. The feeling tones of the elements of this complex and of the complex itself are not only those of the colors and lines as such, but of the interpretative ideas as well; which in turn are the same as those of the corresponding real things. The psychological process is here simple enough. The feeling tone of the sea is carried by the idea of the sea, which now fuses with the green color and wavy lines of the painting.

But in order fully to explain the phenomena of aesthetic expression, it is not sufficient to show how the connection between feeling and sensation and idea takes place; it is necessary, in addition, to explain the nature of this connection. The feeling is not experienced by us as what it is—our reaction to the sensations or represented objects—but rather as an objective quality of them. The sounds are sad, the curve tender, the sea placid and reposeful. Why is this?

The explanation is, I think, as follows. Despite their usual subjectivity, feelings tend to be located in the objective world whenever they are in conflict with or not directly rooted in the personal life or character of the individual. In listening to music, for example, feelings of despair and terror may be aroused in me who am perhaps secure and happy; and even if the feelings are joyous, they are not occasioned by any piece of personal good fortune—my situation in life is the same now as before. Hence, finding no lodgment in the ego, and having to exist somewhere, they seek a domicile in the sounds evoking them. And, in general, works of art arouse but offer no personal occasions for feeling, and therefore absorb it into themselves.

The process of objectification may, however, go further. It often happens in the aesthetic experience that feelings are not objectified alone, but carry with them the idea of the self—I come to feel myself as joyous or despairing in the sounds. The extent to which the idea of the self thus follows the objectified feelings depends largely upon the amount of their reverberation throughout the organism. When this is small, and the feelings are vague and tenuous, as in color appreciation, there is little or no definite projection of the idea of the self; when, on the other hand, it is large and the emotions are strong, as oftentimes in music, where breathing, circulation, hand and foot are affected, then I myself seem to be there,—striving, pursuing, struggling, in the sounds. I am where my body is. The projection of the idea of the self is facilitated for the same reason when the body is actually employed in the creation of the work of art, as in singing and acting. It also occurs more readily when the life expressed in the work of art is akin to the spectator's. Thus, an emotional and suggestible woman, in watching a fine performance of "Magda," inevitably puts herself in the place of the heroine if she has herself lived through a similar experience. But when the life expressed is strikingly foreign to our own, the projection of the idea of self is more difficult; the duality between subject and object tends to remain.