In Das neue Wissen and der neue Glaube (1873) he showed himself as vigorous an opponent of the materialism of Strauss as of the doctrine of papal infallibility.
David Strauss in his Life of Jesus had accounted for the Gospel narratives as half-conscious products of the mythic instinct in the early Christian communities.
Debussy has this in common with Strauss, that he too regards harmonies as pure physical sensations; but he differs from Strauss firstly in systematically refusing to regard them as anything else, and secondly in his extreme sensibility to harshness.
The irrational discords of Strauss are also real phenomena in musical aesthetics.
That stream is sure sooner or later to carry with it every reality that has been reached by side-issues and leaps; and of such things we have important cases in the works of Strauss and Debussy.
According to Strauss the fulfilments of prophecy in the New Testament arise from the Christians' belief that the Christian Messiah must have fulfilled the predictions of the prophets, and the miracles of Jesus in the New Testament either originate in the same way or are purely mythical embodiments of Christian doctrines.
Mariano, Augusto Vera (Naples, 1887) and Strauss e Vera (Rome, 1874); Karl Rosenkranz, Hegel's Naturphilosophie and deren Bearbeitung durch A.