In this article, we present for the first time Schelling’s early critique of absolute idealism within his middle metaphysics (1804–1820), which has great relevance and influence on the subsequent course of German philosophy, and, more broadly considered, on later systematic thinking about the categories of unity and duality. We aim to show how Schelling defends a form of metaphysical duality, from 1804 onwards, without relapsing into a stronger Kantian dualism. In this sense, our author rejects both the dualism between nature (...) and spirit, necessity and freedom, as well as the monist-immanent metaphysical stance later associated with Hegelian panlogism. Against Hegel, Schelling increasingly vindicates the reality of the finite and degrades the infinite to mere ideality in a movement that resembles later existentialism. Furthermore, we defend Schelling against the accusation of irrationalism that sections of Hegelianism formulated against him and present the concept of infinity without the notion of totality, which he thinks of, much like Fichte, in the light of the concept of an ‘infinite task’. Schelling’s later criticisms of Hegel are shown to be influenced by his early idealist critique of the period at hand. (shrink)