CONCLUSION
(N4: 289)
It is noteworthy that the crossed through being sits precisely where world would be in the fourfold schema of the Bremen lectures. Being is pronounced “world.”
The modulation in the sense of being undertaken at the time of the fourfold leads to an antagonism with the notion of ontological difference, a notion often taken as synonymous with Heidegger’s thinking as a whole, a notion that in the 1960s and 1970s he comes to explicitly reject.
Heidegger’s reflections on the issue are perhaps most telling in the marginal notes to a particular passage of the Anaximander interpretation. Heidegger says in that text that “it is the issue [Sache] of being to be the being of beings” (GA 5: 364/274, tm). The marginal note here reads “reference to the ontological difference [ontologische Differenz]” (GA 5: 364 n.b/274 n.a, tm). The discussion continues regarding the way in which presencing has historically been overlooked and misconstrued as something present, as the highest or most universal of what is present, but as something present all the same. Heidegger comments that “the essence of presencing and with this the differentiation [Unterschied] of presencing from what presences remains forgotten. The forgetting of being is the forgetting of the differentiation of being from beings ” (GA 5: 364/275, tm). The language has shifted from one sense of difference, Differenz (“difference”) to another, Unterschied (“differentiation”), and not accidentally. The marginal note to the word “differentiation” in the above reads: “Differentiation [der Unter-Schied] is infinitely different from all being [Sein], which remains the being of beings. Thus it is unfitting to still give differentiation the name of ‘being’—be it with y, be it without” (GA 5: 364 n.d/275 n.a, tm). As such, the thinking of differentiation (of thing and world) ceases to think ontological difference.
For Heidegger this occurs through exposure, something that comes to the fore in one of Heidegger’s poems—or rather “thoughts” (Gedachtes) as he calls them to distinguish them from poetry (Gedichte)