the folk-song, for themselves, out of in-most impulse, unconcerned whether the word is comprehensible to him who does not join in the song. Let us think of our own experiences in the realm of higher art-music: what did we understand of the text of a Mass of Palestrina, of a Cantata of Bach, of an Oratorio of Händel, if we ourselves perhaps did not join in singing? Only for _him who joins_ in singing do lyric poetry and vocal music exist; the listener stands before it as before absolute music. But now the _opera_ begins, according to the clearest testimonies, with the _demand of the listener to understand the word._ What? The listener _demands?_ The word is to be understood? But to bring music into the service of a series of metaphors and conceptions, to use it as a means to an end, to the strengthening and elucidation of such conceptions and metaphors--such a peculiar presumption as is found in the concept of an "opera," reminds me of that ridiculous person who endeavours to lift himself up into the air with his own arms; that which this fool and which the opera according to that idea attempt are absolute impossibilities. That idea of the opera does not demand perhaps an abuse from music but--as I said--an impossibility. Music never _can_ become a means; one may push, screw, torture it; as tone, as roll of the drum, in its crudest and simplest stages, it still defeats poetry and abases the latter to its reflection. The opera as a species of art according to that concept is therefore not only an aberration of music, but an erroneous conception of æsthetics. If I herewith, after all, justify the nature of the opera for æsthetics, I am of course far from justifying at the same time bad opera music or bad opera-verses. The worst music can still mean, as compared with the best poetry, the Dionysean world-subsoil, and the worst poetry can be mirror, image and reflection of this subsoil, if together with the best music: as certainly, namely, as the single tone against the metaphor is already Dionysean, and the single metaphor together with idea and word against music is already Apollonian. Yea, even bad music together with bad poetry can still inform as to the nature of music and poesy.