There is a symmetry between cosmology and epistemology in the Bright Way. A species' noosphere is paired with the epistemological Realm of the Known, the physical universe with the Realm of the Knowable, and the Empyrean with the Realm of the Unknowable.

Here is what First Contact looks like from an epistemological perspective.

Further, since the Uncreated Light does not occupy a single point in space, it is often said that the Empyrean IS the Uncreated Light. The souls of the blessed don't so much dwell in the Empyrean as unite themselves with the Light. The universe is an N-dimensional region embedded within the N+1 (or N+M) dimensions of the Empyrean, replacing N with however many dimensions quantum mechanics/relativity says the universe has.