Opera heard in his earlier operas such as "Der fliegende Holländer", "Tannhäuser" and "Lohengrin"; and he was prepared to violate accepted musical conventions, such as tonality, in his quest for greater expressivity. In his mature music dramas, "Tristan und Isolde", "Die Meistersinger von Nürnberg", "Der Ring des Nibelungen" and "Parsifal", he abolished the distinction between aria and recitative in favour of a seamless flow of "endless melody". Wagner also brought a new philosophical dimension to opera in his works, which were usually based on stories from Germanic or Arthurian legend. Finally, Wagner built his own opera house at Bayreuth with part
Richard Wagner to be Schopenhauer's philosophy, a deeply pessimistic view of the human condition. He remained an adherent of Schopenhauer for the rest of his life. One of Schopenhauer's doctrines was that music held a supreme role in the arts as a direct expression of the world's essence, namely, blind, impulsive will. This doctrine contradicted Wagner's view, expressed in "Opera and Drama", that the music in opera had to be subservient to the drama. Wagner scholars have argued that Schopenhauer's influence caused Wagner to assign a more commanding role to music in his later operas, including the latter half of the "Ring"