the divinity of Truth lies at the heart of and has served as the foundation for the entire subsequent Western intellectual tradition: "But you will have gathered what I am getting at, namely, that it is still a metaphysical faith on which our faith in science rests—that even we knowers of today, we godless anti-metaphysicians still take our fire too, from the flame lit by the thousand-year old faith, the Christian faith which was also Plato's faith, that God is Truth; that Truth is 'Divine'..." Heidegger (1889–1976) Other philosophers take this common meaning to be secondary and derivative. According to Martin Heidegger, the original meaning and essence of truth in Ancient Greece was unconcealment, or the revealing or bringing of what was previously hidden into the open, as indicated by the original Greek term for truth, aletheia. On this view, the conception of truth as correctness is a later derivation from the concept's original essence, a development Heidegger traces to the Latin term veritas. Owing to the primacy of ontology in Heidegger's philosophy, he considered this truth to lie within Being itself, and already in Being and Time (1927) had identified truth with "being-truth" or the "truth of Being" and partially with the Kantian thing-in-itself in an epistemology essentially concerning a mode of Dasein. Sartre (1905–1980) In Being and Nothingness (1943), partially following Heidegger, Jean-Paul Sartre identified our knowledge of the truth as a relation between the in-itself and for-itself of being - yet simultaneously closely connected in this vein to the data available to the material personhood, in the body, of an individual in their interaction with the world and others - with Sartre's description that "the world is human" allowing him to postulate all truth as strictly understood by self-consciousness as self-consciousness of something, a view also preceded by Henri Bergson in Time and Free Will (1889), the reading of which Sartre had credited for his interest in philosophy. This first existentialist theory, more fully fleshed out in Sartre's essay Truth and Existence (1948), which already demonstrates a more radical departure from Heidegger in its emphasis on the primacy of the idea, already formulated in Being and Nothingness, of existence as preceding essence in its role in the formulation of truth, has nevertheless been critically examined as idealist rather than materialist in its departure from more traditional idealist epistemologies such as those of Ancient Greek philosophy in Plato