The Preface to the Phenomenology, all by itself, is considered one of Hegel's major works and a major text in the history of philosophy, because in it he sets out the core of his philosophical method and what distinguishes it from that of any previous philosophy, especially that of his German Idealist predecessors (Kant, Fichte, and Schelling).

Hegel's approach, referred to as the Hegelian method, consists of actually examining consciousness' experience of both itself and of its objects and eliciting the contradictions and dynamic movement that come to light in looking at this experience. Hegel uses the phrase "pure looking at" (reines Zusehen) to describe this method. If consciousness just pays attention to what is actually present in itself and its relation to its objects, it will see that what looks like stable and fixed forms dissolve into a dialectical movement. Thus philosophy, according to Hegel, cannot just set out arguments based on a flow of deductive reasoning. Rather, it must look at actual consciousness, as it really exists.