It is the affirmation that poems are every- where, that paintings are everywhere. So, it is also the development of a whole series of forms of perception which allow us to see the beautiful everywhere. This implies a great anonymisation of the beautiful (Mallarmé’s “ordinary” splendour). I think this is the real kernel: the idea of equality and anonymity. At this point, the ideal of art becomes the conjunction of artistic will and the beauty or poeticity that is in some sense immanent in everything, or that can be uncovered everywhere.
That is what you find all through the fiction of the nineteenth century, but it’s at work in the poetry too. For example, it’s what Benjamin isolated in Baudelaire, but it’s something much broader than that too. It implies a sort of exploding of genre and, in particular, that great mixing of literature and painting which dominates both literature and painting in the nineteenth century. It is this blending of literature and painting, pure and applied art, art for art’s sake and art within life, which will later be opposed by the whole modernist doxa that asserts the growing autonomy of the various arts.