from there-understand what is said while letting go of their preconceived notions (cf. Laufende Anmerkungen zu "Sein und Zeit").
177. Being-away
Being-away [Weg-sein] = being-gone [Fort-sein]; in this sense, simply comparable to ἀπουσια ["absence"] over and against παρουσία, Dasein = objective presence (cf. Away! = Gone! [wegnehmen = fortnehmen]).
On the other hand, as soon as Da-sein is understood in an essentially different sense, the corresponding being-away is also understood differently.
Da-sein: withstanding the openness of self-concealing. Being-away: pressing on with the closedness of the mystery and of being; forgottenness of being. And this happens in being-away according to this sense: to be infatuated with things, smitten with them, lost in them.
Being-away, in this sense, only where Da-sein. "Away": the removal, pushing aside of beyng, i.e., apparently, only of "beings" for themselves. Herein is expressed in converse the essential relation of Da-sein to beyng. For the most part and in general our existence is a being-away, precisely in its "closeness to life."
This "clarification" could easily be held up as a paradigm case of "philosophizing" with mere "words." But it is just the opposite: being- away comes to be the name of an essential (and indeed necessary) manner in which the human being relates-and indeed must relate-to Da-sein. With this, Da-sein itself undergoes a necessary determination.
Being-away not sufficiently expressed by "inauthenticity," inasmuch as authenticity is not to be understood in a moral-existentiell sense but, rather, in terms of fundamental ontology as a character of that Da-sein which endures the "there" by sheltering the truth in some fashion or other (such as thoughtfully or poetically, or by building, leading, sacrificing, suffering, rejoicing).
178. "Da-sein exists for the sake of itself"
In what sense? What is Da-sein, and what does it mean to "exist" [existieren]? Da-sein is the enduring of the truth of beyng, and Da-sein "is" this, and only this, as an ex-sisting [ex-sistierend] self which steadfastly withstands exposedness.