On the tautology. Heidegger and the problem of the esprit

The present article deals with the role of spirit during the three main periods of Heidegger's philosophy. Beyond a purely lexicographical approach, our analyses intend to show that in Heidegger's thought the question of spirit is inseparably tied up with the linguistic form of tautology. In Being and time, tautology appears as the linguistic articulation proper to original temporality as opposed to the idealistic conceptions of spirit as identity. In a second step, we will demonstrate that, during the nineteen thirties, Heidegger's conception of spirit is to be read as an answer to the ambiguous use of this notion in contemporary philosophical and literary discourse. In the third and last section, we will elaborate the analogy between the later Heidegger's use of tautology with regard to the essence of language and the history of the translation, inside the German mystical and literary tradition, of a verse of the Gospel of Saint John where the nature of spirit (in the sense of-Pneuma) is equally expressed in a tautological formula.