Nabokov’s fiction is always becoming propaganda on behalf of good noticing, hence on behalf of itself. There are beauties that are not visual at all, and Nabokov has poorish eyes of those. How else to explain his dismissal of Mann, Camus, Faulkner, Stendhal, James? He judges them, essentially, for not being stylish enough, and for not being alert enough.
James Wood: How Fiction Works