such, within itself, with respect to the not-yet and the no-longer. The transitionary character of each now is nothing but what we described as the spannedness of time.
That time should hold-around beings, con-tain them, in such a way that we recognize what it holds as intratemporal, is possible and necessary because of the character of time as world-time. Due to its ecstatic character temporality is, as it were, further outside than any possible object which the Dasein can encounter as temporal. Because of this, any being that the Dasein encounters is already embraced by time from the very outset.
Similarly, the essential countedness of time is rooted in the ecstatic-horizonal constitution of temporality. Time's character as container and as world-time, as well as its essential unveiledness, will emerge still more clearly in what follows.
It should suffice that we now have an approximate view of time as sequence of nows with respect to its derivation from temporality; we can thus recognize that the essential structure of temporality is the self-enclosed ecstatic-horizonal unity of future, past, and present in the sense explained. Temporality [Zeitlichkeit] is the condition of the possibility of the constitution of the Dasein's being. However, to this constitution there belongs understanding of being, for the Dasein, as existent, comports itself toward beings which are not Daseins and beings which are. Accordingly, temporality must also be the condition of possibility of the understanding of being that belongs to the Dasein. How does temporality make such understanding of being possible? How is time as temporality the horizon for the explicit understanding of being as such, if being is supposed to be the theme of the science of ontology, or scientific philosophy? In its role as condition of possibility of the understanding of being, both pre-ontological and ontological, we shall call temporality Temporality [Temporalität].
§20. temporality [Zeitlichkeit] and Temporality [Temporalität]
What has to be shown is this: temporality is the condition of the possibility of all understanding of being; being is understood and conceptually comprehended by means of time. When temporality functions as such a condition we call it Temporality. The understanding of being, the development of this understanding in ontology, and scientific philosophy are to be exhibited in their Temporal possibility. What exactly is the meaning of this "understanding of being" into whose Temporal possibility we are inquiring? By the discussion of the four theses we have shown in different ways that and how something like an understanding of being belongs to the existent Dasein. We now stand before or, better, in the fact that we understand being but nevertheless do not conceptually comprehend it.