of heedfulness. Freeing and letting something be relevant is referred within this totality. With that which is encountered as at hand there is always relevance in a region. A regional spatial relevance belongs to the totality of relevance which constitutes the being of things at hand in the surrounding world. On the basis of this relevance, things at hand can be found and determined according to form and direction. In accordance with the possible transparency of heedful circumspection, innerworldly things at hand are de-distanced and oriented with the factical being of Dasein.
Letting innerworldly beings be encountered, which is constitutive for being-in-the-world, is "giving space." This "giving space," which we call making room, frees things at hand for their spatiality. As a way of discovering and presenting a possible totality of places relevantly determined, making room makes actual factical orientation possible. As circumspect taking care of things in the world, Dasein can change things around, remove them or "make room" for them only because making room—understood as an existential—belongs to its being-in-the-world. But neither the previously discovered region nor the actual spatiality in general are explicitly in view. In itself, it is present in the inconspicuousness of things at hand being taken care of by a circumspection absorbed in them for that circumspection. Space is initially discovered in this spatiality with being-in-the-world. On the basis of the spatiality thus discovered, space itself becomes accessible to cognition.
Space is neither in the subject nor is the world in space. Rather, space is "in" the world since the being-in-the-world constitutive for Dasein has disclosed space. Space is not in the subject, nor does that subject observe the world "as if" it were in space. Rather, the "subject," correctly understood ontologically, Dasein, is spatial in a primordial sense. And because Dasein is spatial in the way described, space shows itself as a priori. This term does not mean something like belonging beforehand to an initially worldless subject which spins a space out of itself. Here, apriority means the previousness of encountering space (as region) in the actual encountering of things at hand in the surrounding world.
The spatiality of what is initially circumspectly encountered can itself become thematized and so the task of calculation and measurement  for circumspection, as for example, in building a house and surveying land. With this predominantly circumspect thematization of the spatiality of the surrounding world, space in itself already comes to view in a way. The space which thus shows itself can be studied by purely looking at it, if that which was formerly the sole possibility of access to space, namely, circumspect calculation, is given up. The "formal intuition" of space discovers pure possibilities of spatial relations. Here there is a series of stages laying bare pure, homogeneous