where no clear meaning is apparent." Furthermore, according to Markus Bandur, the Urantia Book references are concealed by means of associative strategies to other fields of meaning and, as work progressed on Licht after the first-composed opera, Donnerstag, their significance progressively diminishes. The importance of the Urantia Book for Stockhausen's work should not be overestimated. Structure The musical structure of the cycle is based on three counterpointed main melodies (or "formulas"), each associated with a central character. It follows the method of super-formula composition: these melodies define both the tonal centers and durations of scenes as a whole, as well as the melodic phrasing in detail. Each of the three central characters is also associated with an instrument: Michael with the trumpet, Eve with the basset horn, and Lucifer with the trombone. [See : the Licht superformula.] Stockhausen's conception of opera is more akin to the tableaux of the Renaissance masque and its hermetic cosmology than to traditional dramatic and climactic structures typical of the past two centuries. Because of its circular structure, in which the seven days of the week must be passed through again and again, a moral critique is rendered impossible, since the themes of the days perpetually return as permanent features of reality. This in turn reflects Stockhausen's theological outlook, which offers a perspective beyond the superficial differences and opposites that place limitations on thought and hope. Licht is not therefore primarily about the conflict between good and evil, but rather is a drama of latent tensions concerning a dispute about different conceptions of reality. The cycle is constructed modularly. Not only is each of the seven operas a self-sufficient work, but so are the individual acts, scenes, and—in some cases—portions of scenes. These modules may be segments (e.g., the eleven instrumental solo sections from Orchester-Finalisten from Mittwoch), or layers (e.g., the electronic Oktophonie layer from the second act of Dienstag or the Klavierstück XIII version of the first scene of Samstag (Luzifers Traum), with the bass voice omitted), or a combination of the two (e.g., the vocal sextet Menschen, hört and the Bassetsu-Trio, which are two layers of the "Karusel" subscene from Michaelion, the fourth scene of Mittwoch). The seven days There are seven operas, each named for a day of the week, whose subject matter reflects attributes associated in traditional mythologies with each day. These attributes in turn rest on the seven planets of