According to the Routledges History of Philosophy, Vol 6 - The Age of German Idealism, Schelling
had begun to characterize his new standpoint as “positive philosophy,” in contradistinction to the purely “negative” philosophy of Kant, Fichte, and Hegel—as well as of his own Jena period.
Schelling’s dissatisfaction with the purely formal or “negative” concept of nature defended by Fichte, together with his admiration for Spinoza’s interpretation of nature as a self-developing whole (natura naturans)
Is this because, roughly, we have nature conforming to man? ie Kants copernican revolution of objects conforming to consciousness, Hegels World conforming to Spirit and Fichtes formal concept of nature.