The incident of the single canvas, which by its illuminating revealment first discloses to the observer the true significance of pictures, is typical of the whole scope of art. The mission of art is to reveal. It is the prophet's message to his fellow men, the apocalypse of the seer. The artist is he to whom is vouchsafed a special apprehension of beauty. He has the eye to see, the temperament to feel, the imagination to interpret; it is by virtue of these capacities, this high, transfiguring vision, that he is an artist; and his skill of hand, his equipment with the means of expression, is incidental to the great fact that he has somewhat to express that the common man has not. To his work, the manifestation of his spirit in material form, his perception made sensible, is accorded the name of art. Art is expression. It is not a display of skill; it is not the reproduction of external forms or appearances; it does not even, as some say, exist for itself: it is a message, a means. To cry "Art for Art's sake!" is to converse with the echo. Such a definition but moves in a circle, and doubles upon itself. No; art is for the artist's sake. The artist is the agent or human instrument whereby the supreme harmony, which is beauty, is manifested to men. Art is the medium by which the artist communicates himself to his fellows; and the individual work is the expression of what the artist felt or thought, as at the moment some new aspect of the universal harmony was revealed to his apprehension. Art is emotion objectified, but the object is subordinated to the emotion as means is to an end. The material result is not the final significance, but what of spiritual meaning or beauty the artist desired to convey. Not what is painted, as the layman thinks, not how it is painted, as the technician considers, but why did the artist paint it, is the question which sums up the truth about art. The appreciator need simply ask, What is the beauty, what the idea, which the artist is striving to reveal by these symbols of color and form? He understands that the import of the work is the _idea,_ and that the work itself is beautiful because it symbolizes a beautiful idea; its significance is spiritual. The function of art, then, is through the medium of concrete, material symbols to reveal to men whatever of beauty has been disclosed to the artist's more penetrating vision.