[Illustration of lines arranged into three facial profiles] Two of the forms are differently grotesque and one approximately beautiful. Now these effects are due to the expression of the lines; not only because they make one think of fair or ugly faces, but because, it may be said, these faces would in reality be fair or ugly according to their expression, according to the vital and moral associations of the different types. Nevertheless, beauty of form cannot be reduced to expression without denying the existence of immediate aesthetic values altogether, and reducing them all to suggestions of moral good. For if the object expressed by the form, and from which the form derives its value, had itself beauty of form, we should not advance; we must come somewhere to the point where the expression is of something else than beauty; and this something else would of course be some practical or moral good. Moralists are fond of such an interpretation, and it is a very interesting one. It puts beauty in the same relation to morals in which morals stand to pleasure and pain; both would be intuitions, qualitatively new, but with the same materials; they would be new perspectives of the same object. But this theory is actually inadmissible. Innumerable aesthetic effects, indeed all specific and unmixed ones, are direct transmutations of pleasures and pains; they express nothing extrinsic to themselves, much less moral excellences. The detached lines of our figure signify nothing, but they are not absolutely uninteresting; the straight line is the simplest and not the least beautiful of forms. To say that it owes its interest to the thought of the economy of travelling over the shortest road, or of other practical advantages, would betray a feeble hold on psychological reality. The impression of a straight line differs in a certain almost emotional way from that of a curve, as those of various curves do from one another. The quality of the sensation is different, like that of various colours or sounds. To attribute the character of these forms to association would be like explaining sea-sickness as the fear of shipwreck. There is a distinct quality and value, often a singular beauty, in these simple lines that is intrinsic in the perception of their form.