This conception of the feelings of sublimity excited by the loneliness of an Alpine peak or the grandeur of an earthquake is now a familiar one; but it was not so in Kant’s day. Switzerland had not then become the recreation-ground of Europe; and though natural beauty was a familiar topic with poets and painters it was not generally recognised that taste has also to do with the sublime. De Saussure’s _Travels_, Haller’s poem _Die Alpen_, and this work of Kant’s mark the beginning of a new epoch in our ways of looking at the sublime and terrible aspects of Nature. And it is not a little remarkable that the man who could write thus feelingly about the emotions inspired by grand and savage scenery, had never seen a mountain in his life. The power and the insight of his observations here are in marked contrast to the poverty of some of his remarks about the characteristics of beauty. For instance, he puts forward the curious doctrine that colour in a picture is only an extraneous charm, and does not really add to the beauty of the form delineated, nay rather distracts the mind from it. His criticisms on this point, if sound, would make Flaxman a truer artist than Titian or Paolo Veronese. But indeed his discussion of Painting or Music is not very appreciative; he was, to the end, a creature of pure Reason. Upon the analysis he gives of the Arts, little need be said here. Fine Art is regarded as the Art of Genius, “that innate mental disposition through which Nature gives the rule to Art” (§ 46). Art differs from Science in the absence of definite concepts in the mind of the artist. It thus happens that the great artist can rarely communicate his methods; indeed he cannot explain them even to himself. _Poeta nascitur, non fit_; and the same is true in every form of fine art. Genius is, in short, the faculty of presenting aesthetical Ideas; an aesthetical Idea being an intuition of the Imagination, to which no concept is adequate. And it is by the excitation of such ineffable Ideas that a great work of art affects us. As Bacon tells us, “that is the best part of Beauty which a picture cannot express; no, nor the first sight of the eye.” This characteristic of the artistic genius has been noted by all who have thought upon art; more is present in its productions than can be perfectly expressed in language. As Pliny said of Timanthus the painter of Iphigenia, “In omnibus ejus operibus intelligitur plus super quam pingitur.” But this genius requires to be kept in check by taste; quite in the spirit of the σωφροσύνη of the best Greek art, Kant remarks that if in a work of art some feature must be sacrificed, it is better to lose something of genius than to violate the canons of taste. It is in this self-mastery that “the sanity of true genius” expresses itself.