An early answer to the question would have been, that the eye is so hung in its muscles as to move most easily in curved lines, and this easy action in following the curve is felt as favorable stimulation. But recent experiment<1> has shown that the eye in fact moves by most irregular, angular leaps from point to point of the figure. The theory is therefore remodeled by substituting for the movement sensations of the eye, the tendencies corresponding to those early movements of touching imitative of the form, by which we learned to know a form for what it is, and the reproduction of feeling-tones belonging to the character of such movement. The movements of touching and feeling for a smooth continuous curved object are themselves pleasant. This complex of psychical factors makes a pleasurably stimulating experience. The greater the tendency to complete reproduction of these movements, that is, the stronger the "bodily resonance," the more vivid the pleasure. Whether we (with Groos) designate this as sympathetic reproduction, or (with Lipps) attribute to the figure the movements and the feelings which resound in us after this fashion, or even (with Witasek) insist on the purely ideal character of the reproduction, seems to me not essential to the explanation of the pleasing character of the experience, and hence of the beauty of the object. Not THAT we sympathetically reproduce ("Miterleben"), or "feel ourselves into" a form ("Einfuhlen"), but HOW we do so, is the question. <1> G.M. Stratton, _Philos. Studies_, xx. All that Hogarth says of the beauty of the serpentine line, as "leading the eye a kind of chase," is fully in harmony with this view, if we add to the exploiting movements of the eyes those other more important motor innervations of the body. But we should still have to ask, WHAT kind of chase? Sharp, broken, starting lines might be the basis of a much more vivid experience, --but it would be aesthetically negative. "The complete sensuous experience of the spatial" is not enough, unless that experience is positively, that is, favorably toned. Clear or vivid seeing made possible by the form of the object is not enough. Only as FAVORABLY stimulating, that is, only as calling up ideal reproductions, or physical imitations, of movements which in themselves were suited to the functions of the organs involved, can forms be found positively aesthetic, that is, beautiful.