" 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 … 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 … 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 … 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 possible on the basis of Dasein’s being as *care* … As care, Dasein is the ‘between’. "

― Martin Heidegger , Being and Time