It is the mind that posits noumena in the sense in which its experience of each phenomenon includes a beyond along with it; in the sense in which the mirror has a tain, or the wall an outside. The noumenon is not something separate from the phenomenon, but part and parcel of its essence; and it is within the mind that realities outside or beyond the mind are "posited." To be sure, the language of the mind and of thinking is too narrow and specialized for this more general structural principle, which is also a dialectical one. The more fundamental question for such a doctrine — or for such a method, for such a perspective, if you prefer – is not whether objective reality exists; but rather from what vantage point the operation of positing is itself observable. Are we not outside the mind in another way when we show how the mind itself posits its own limits and its own beyond?

Fredric Jameson, The Hegel Variations (Verso, 2010) pp. 29-30