"they", the question of the "who" of the everydayness of Being-with-one-another is answered. These considerations have at the same time brought us a concrete understanding of the basic constitution of Dasein: Being-in-the-world, in its everydayness and its averageness, has become visible.
 From the kind of Being which belongs to the "they"—the kind which is closest—everyday Dasein draws its pre-ontological way of interpreting its Being. In the first instance ontological Interpretation follows the tendency to interpret it this way : it understands Dasein in terms of the world and comes across it as an entity within-the-world. But that is not all : even that meaning of Being on the basis of which these 'subject' entities [diese seienden "Subjekte"] get understood, is one which that ontology of Dasein which is 'closest' to us lets itself present in terms of the 'world'. But because the phenomenon of the world itself gets passed over in this absorption in the world, its place gets taken [tritt an seine Stelle] by what is present-at-hand within-the-world, namely, Things. The Being of those entities which are there with us, gets conceived as presence-at-hand. Thus by exhibiting the positive phenomenon of the closest everyday Being-in-the-world, we have made it possible to get an insight into the reason why an ontological Interpretation of this state of Being has been missing. This very state of Being,1 in its everyday kind of Being, is what proximally misses itself and covers itself up .
If the Being of everyday Being-with-one-another is already different in principle from pure presence-at-hand-in spite of the fact that it is seemingly close to it ontologically—still less can the Being of the authentic Self be conceived as presence-at-hand. Authentic Being-one's-Self does not rest upon an exceptional condition of the subject, a condition that has been detached from the "they"; it is rather an existentiell modification of the "they"—of the "they" as an essential existentiale .
But in that case there is ontologically a gap separating the selfsameness of the authentically existing Self from the identity of that "I" which maintains itself throughout its manifold Experiences.
1 We interpret Heidegger's pronoun 'Sie' as referring to 'Seinsverfassung' ('state of Being'); but there are other words in the previous sentence to which it might refer with just as much grammatical plausibility, particularly 'Interpretation'.