VII. Modern Man and His World Conception

> that we never perceive the objective processes of nature but rather their effect on us, not vibrations of the ether but light, not air vibrations but sounds. We have then, so to speak, a subjectively falsified world picture, but this does not interfere with our practical orientation because this falsification shows no individual differences and proceeds in a constant manner and according to law. . . . Materialism itself has proved through natural science that the world transcends beyond our senses. It has undermined its own foundation and it has sawed off the branch on which it had been sitting. As a philosophy, however, it still continues to sit on that branch. Materialism, therefore, has no right at all to call itself a philosophy … . It has only the justification of a branch of knowledge; furthermore, the world, the object of its study, is a world of mere appearance. To try to build a world conception on this foundation is an obvious self-contradiction. The real world is entirely different, qualitatively as well as quantitatively, from the one that is known to materialism, and only the real world can be the object of a philosophy. (Carl du Prel, The Riddle of Man.)