Harmony and Unity

While Nietzsche's Dionysian principle is explicitly derived from Schopenhauer's concept of Will, it departs significantly from it.  Whereas that Will, according to Schopenhauer, is the source of universal suffering, the Dionysian realm, as Nietzsche describes it in the first section of Birth of Tragedy, is one of "universal harmony", in which each "feels himself not only united, reconciled, and fused, with his neighbor, but as one with him, . . . in ecstasy."  However, Harmony and Unity are not equivalent--the former entails a multiplicity, while the latter does not.  Hence, Nietzsche also inherits from his predecessor the problem of the existence of noumenal plurality, a problem which remains unaddressed in that section.