But as an investigation of Being, it brings to completion, autonomously and explicitly, that understanding of Being which belongs already to Dasein and which 'comes alive' in any of its dealings with entities. Those entities which serve phenomenologically as our preliminary theme—in this case, those which are used or which are to be found in the course of production—become accessible when we put ourselves into the position of concerning ourselves with them in some such way. Taken strictly, this talk about "putting ourselves into such a position" [Sichversetzen] is misleading; for the kind of Being which belongs to such concernful dealings is not one into which we need to put ourselves first. This is the way in which everyday Dasein always is: when I open the door, for instance, I use the latch. The achieving of phenomenological access to the entities which we encounter, consists rather in thrusting aside our interpretative tendencies, which keep thrusting themselves upon us and running along with us, and which conceal not only the phenomenon of such 'concern', but even more those entities themselves as encountered of their own accord in our concern with them. These entangling errors become plain if in the course of our investigation we now ask which entities shall be taken as our preliminary theme and established as the pre-phenomenal basis for our study.
One may answer: "Things." But with this obvious answer we have perhaps already missed the pre-phenomenal basis we are seeking. For in  addressing these entities as 'Things' (res), we have tacitly anticipated their ontological character. When analysis starts with such entities and goes on to inquire about Being, what it meets is Thinghood and Reality. Ontological explication discovers, as it proceeds, such characteristics of Being as substantiality, materiality, extendedness, side-by-side-ness, and so forth. But even pre-ontologically, in such Being as this, the entities which we encounter in concern are proximally hidden. When one designates Things as the entities that are 'proximally given', one goes ontologically astray, even though ontically one has something else in mind. What one really has in mind remains undetermined. But suppose one characterizes these 'Things' as Things' invested with value'? What does "value" mean onto logically? How are we to categorize this 'investing' and Being-invested? Disregarding the obscurity of this structure of investiture with value, have we thus met that phenomenal characteristic of Being which belongs to what we encounter in our concernful dealings (πρᾶξις).
The Greeks had an appropriate term for 'Things': πράγματα—that is to say, that which one has to do with in one's concernful dealings