[Death] is only the ‘end’ of Dasein; and, taken formally, it is just one of the ends by which Dasein's totality is closed round. The other ‘end’, however, is the ‘beginning’, the ‘birth’. Only that entity which is ‘between’ birth and death presents the whole which we have been seeking… Dasein has [so far] been our theme only in the way in which it exists ‘facing forward’, as it were, leaving ‘behind’ all that has been. Not only has Being-towards-the-beginning remained unnoticed; but so too, and above all, has the way in which Dasein stretches along between birth and death. (Being and Time 72: 425).