The balance between literature and philosophy in Schopenhauer and Nietzsche is different from that struck in the novella, but, as Mann clearly pointed out in his writings about both thinkers, both modes are present.
Philip KitcherSometime during the 1990s, when I was teaching philosophy at UCSD, my friend, colleague, and music teacher, Carol Plantamura, discussed the possibility of teaching a course together looking at ways in which various literary works (plays, stories, novels) had been treated as operas, and how different themes emerged in the opera and in its original. One of the pairings we planned to use was Mann's great novella and Britten's opera. Unfortunately, the course was never taught, but the idea remained with me.
Philip KitcherSo this is my attempt to give a preliminary - probably far too crude - account of how philosophy by showing can really teach us. The attempts we make to work through problems by reasoning always presuppose starting points, and even the most self-critical philosophers adopt some of those starting points simply by picking them up from the social environments in which they grow up.
Philip KitcherPhilosophy by showing - including philosophy in literature - does truly valuable work in leading us to new perspectives from which our arguments can then begin. It does so by introducing new synthetic complexes, which we then reflect on from various points of view. When the complexes survive and grow, that initial showing has been philosophically decisive.
Philip Kitcher