The Being of this perseveringly changing connectedness of Experiences remains indefinite. But at bottom, whether one likes it or not, in this way of characterizing the connectedness of life, one has posited something present-at-hand 'in time', though something that is obviously 'un-Thinglike'.
If we have regard for what we have worked out under the title of "temporality" as the meaning of the Being of care, we find that while the ordinary interpretation of Dasein, within its own limits, has its justification and is sufficient, we cannot carry through a genuine ontological analysis of the way Dasein stretches along between birth and death if we take this interpretation as our clue, nor can we even fix upon such an analysis as a problem.
Dasein does not exist as the sum of the momentary actualities of Experiences which come along successively and disappear. Nor is there a sort of framework which this succession gradually fills up. For how is such a framework to be present-at-hand, where, in each case, only the Experience one is having 'right now' is 'actual',1 and the boundaries of the framework -the birth which is past and the death which is only oncoming-lack actuality? At bottom, even in the ordinary way of taking the 'connectedness of life', one does not think of this as a framework drawn tense 'outside' of Dasein and spanning it round, but one rightly seeks this connectedness in Dasein itself When, however, one tacitly regards this entity ontologically as something present-at-hand 'in time', any attempt at an ontological characterization of the Being 'between' birth and death will break down.
Dasein does not fill up a track or stretch 'of life'-one which is somehow present-at-hand-with the phases of its momentary actualities. It stretches itself along in such a way that its own Being is constituted in advance as a stretching-along. The 'between' which relates to birth and death already lies in the Being of Dasein. On the other hand,it is by no means the case that Dasein 'is' actual in a point of time, and that, apart from this, it is 'surrounded' by the non-actuality of its birth and death. Understood existentially, birth is not and never is something past in the sense of something no longer present-at-hand; and death is just as far from having the kind of Being of something still outstanding, not yet present-at-hand but coming along. Factical Dasein exists as born; and, as born, it is already dying, in the sense of Being-towards-death. As long as Dasein factically exists, both the 'ends' and their 'between' are, and they are in the only way which is possible on the basis of Dasein's Being as care. Thrownness and that Being towards death in which one either flees it or anticipates
1 '... wo doch je nur das "aktuelle" Erlebnis "wirklich" ist ...'