One of the essential sites of speechlessness is anxiety in the sense of the horror to which the abyss of the nothing attunes human beings. The nothing, as other than beings, is the veil of being.a Every destiny of beings has already in its origins come to its completion in being.
The last poetizing of the last poet in the dawn of the Greek world, namely, Sophocles' Oedipus at Colonus, closes with words that, in a manner impossible for us to follow, hark back to the concealed history of that people and preserve their entry into the unknown truth of being:
ἀλλ' ἀποταύετε μηδ' ἐπὶ πλείω
πάντως γὰρ ἔχει τάδε κῦρος
 But cease now, and nevermore hereafter
Awaken such lament;
For what has happened keeps with it everywhere preserved a decision of completion.
a Fifth edition, 1949: The nothing: That which annuls, i.e., as difference, is as the veil of being, i.e., of beyng in the sense of the appropriative event of usage.