None the less, perhaps, the highest pleasure in art is identical with the highest pleasure in scientific theory. The emotion which accompanies the clear recognition of unity in a complex seems to be so similar in art and in science that it is difficult not to suppose that they are psychologically the same. It is, as it were, the final stage of both processes. This unity-emotion in science supervenes upon a process of pure mechanical reasoning; in art it supervenes upon a process of which emotion has all along been an essential concomitant.
It may be that in the complete apprehension of a work of art there occurs more than one kind of feeling. There is generally a basis of purely physiological pleasure, as in seeing pure colours or hearing pure sounds; then there is the specifically æsthetic emotion by means of which the necessity of relations is apprehended, and which corresponds in science to the purely logical process; and finally there is the unity-emotion, which may not improbably be of an identical kind in both art and science.
In the art of painting we may distinguish between the unity of texture and the unity of design. I know quite well that these are not really completely separable, and that they are to some extent mutually dependent; but they may be regarded as separate for the purpose of focussing our attention. Certainly we can think of pictures in which the general architecture of the design is in no way striking or remarkable which yet please us by the perfection of the texture, that is to say, the ease with which we apprehend the necessary relationship of one shape, tone or colour with its immediately surrounding shapes, tones or colours; our æsthetic sense is continually aroused and satisfied by the succession of inevitable relationships. On the other hand, we know of works of art in which the unity and complexity of the texture strike us far less than the inevitable and significant relationship of the main divisions of the design--pictures in which we should say that the composition was the most striking beauty. It is when the composition of a picture, adequately supported as it must be by significance of texture, reveals to us the most surprising and yet inevitable relationships that we get most strongly the final unity-emotion of a work of art. It is these pictures that are, as S. would say of certain theories, the most significant for contemplation. Nor before such works can we help implicitly attributing to their authors the same kind of power which in science we should call “great intellect,” though perhaps in both the term “great imaginative organisation” would be better.