Sometimes Hayden White can help you

Funnily enough, one can find keys to understanding for instance how Kittler uses literature and how Ernst thinks of the medium through this Hayden White quote:

“every discourse is always as much about discourse itself as it is about the objects that make up its subject matter.” (Tropics of Discourse: Essays in Cultural Criticism [London / Baltimore: Johns Hopkins University Press, 1978], 4.)