One of the most intriguing aspects of the existential philosophies of the early twentieth century, above all, Martin Heidegger's and Sartre's, is their complex, ambiguous relation to ideas of transcendence associated with traditional religious conceptions. In the case of Heidegger's early existential phenomenology, commentators have often identified affinities between his concept of authenticity in Being and Time and ideas of conversion familiar from such traditions. Heideggerian Eigentlichkeit, the possible human self-relation described, or pointed to, 'formally indicated', in Division Two of Being and Time discloses Dasein to itself as necessarily in the world but not of the world. Corresponding to Heidegger's being-in-the world we find, in Sartre's writings of the 1930s and 1940s, the concept of the for-itself or the human reality. The for-itself is essentially embodied consciousness in necessary correlation with a world of objects.