—above all—the kind of discovering which belongs to the science in question awaits solely the discoveredness of the present-at-hand. This awaiting of discoveredness has its existentiell basis in a resoluteness by which Dasein projects itself towards its potentiality-for-Being in the 'truth'. This projection is possible because Being-in-the-truth makes up a definite way in which Dasein may exist. We shall not trace further how science has its source in authentic existence. It is enough now if we understand that the thematizing of entities within-the-world presupposes Being-in-the-world as the basic state of Dasein, and if we understand how it does so.
If the thematizing of the present-at-hand-the scientific projection of Nature—is to become possible, Dasein must transcend the entities thematized. Transcendence does not consist in Objectifying, but is presupposed by it. If, however, the thematizing of the present-at-hand within-the-world is  a change-over from the concern which discovers by circumspection, then one's 'practical' Being alongside the ready-to-hand is something which a transcendence of Dasein must already underlie.
If, moreover, thematizing modifies and Articulates the understanding of Being, then, in so far as Dasein, the entity which thematizes, exists, it must already understand something like Being. Such understanding of Being can remain neutral. In that case readiness-to-hand and presence-at-hand have not yet been distinguished; still less have they been conceived ontologically. But if Dasein is to be able to have any dealings with a context of equipment, it must understand something like an involvement, even if it does not do so thematically: a world must have been disclosed to it. With Dasein's factical existence, this world has been disclosed, if Dasein indeed exists essentially as Being-in-the-world.1 And if Dasein's Being is completely grounded in temporality, then temporality must make possible Being-in-the-world and therewith Dasein's transcendence; this transcendence in turn provides the support for concernful Being alongside entities within-the-world, whether this Being is theoretical or practical.
(c) The Temporal Problem of the Transcendence of the World
Circumspective concern includes the understanding of a totality of involvements,
and this understanding is based upon a prior understanding
of the relationships of the "in-order-to", the "towards-which", the "towards-this",
and the "for-the-sake-of". The interconnection of these relationships
has been exhibited earlierxxiv as "significance". Their unity makes up what
we call the "world". The question arises of how anything like the world
in its unity with Dasein is ontologically possible. In what way must the
world be, if Dasein is to be able to exist as Being-in-the-World?
1 In the older editions this sentence is introduced by 'Und' ('And').