21. Johann Georg Sulzer, Allgemeine Theorie der schönen Künste, 4 vols. (Leipzig: in der Weidmannschen Buchhandlung, neue vermehrte, 2. Auflage, 1792–1799), II: 369. The translation is drawn in part from Nancy Kovaleff Baker and Thomas Christensen, eds., Aesthetics and the Art of Musical composition in the German Enlightenment: Selected Writings of Johann Georg Sulzer and Heinrich Christoph Koch (Cambridge: Cambridge University Press, 1995), 93.