The Essence of Truth must count as one of Heidegger's most important works, for nowhere else does he give a comparably thorough explanation of what is arguably the most fundamental and abiding theme of his entire philosophy, namely the difference between truth as the "unhiddenness of beings" and truth as the "correctness of propositions." For Heidegger, it is by neglecting the former primordial concept of truth in favor of the latter derivative concept that Western philosophy, beginning already with Plato, took off on its "metaphysical" course towards the bankruptcy of the present day.