Being is a destining sending. As the concealed origin, Being lets occur the presencing and essencing of entities in the openness of presence as the clearing, which is the human being. At the same time, Being's destining sending implies a self-concealment of the origin. Being, as releasement, departs from the origin, so that the presence of its present parts forms the concealment of the origin as past and future. By withholding its futural complete arrival in the present, Being remains epochal and in transition, which excludes a constant presence of Being, fostering at once the oblivion of Being in the sense of a hidden futural origin. Heidegger names the totality of the dynamics of Being the "appropriating event".