"Such external or mere means, as we properly term them, are usually of such a sort that others can be substituted for them; the particular ones employed are determined by some extraneous consideration, like cheapness. But the moment we say “media”, we refer to means that are incorporated in the outcome. Even bricks and mortar become part of the house they are employed to build; they are not mere means to its erection. Colors are the painting; tones are the music. A picture painted with water colors has a quality different from that painted with oil. Esthetic effects belong intrinsically to their medium; when another medium is substituted, we have a stunt rather than an object of art. Even when substitution is practiced with the utmost virtuosity or for any reason outside the kind of end desired, the product is mechanical or a tawdry sham — like boards painted to resemble stone in the construction of a cathedral, for stone is integral not just physically, but to the esthetic effect."