Dick tries to outline how someone can become aware of a thing that is already familiar to them and make the leap from cognitive estrangement to “cognitive affinity.” It is difficult for him to explain the concepts though when space and time don’t exist, which means there isn’t really a “before” individual who would have already understood it.
He wonders if post-Newtonian physics might lead to us viewing reality as a unified field, exactly what he saw in 3-74. I think he is suggesting the atomists (presumably Newton and the other pioneers of physics) promoted a view of the world that prevented us from perceiving the continuum of the Noös. The quantum mechanical understanding of physics allows us to see the world correctly as a unified whole.
He believes the biosphere has been penetrated by the Logos and is alive to the point where it should be able to speak. Perhaps that is the source of the AI voice, and that could mean the AI voice is Tagore.
The biosphere/noosphere is trying to communicate, but we can’t make sense of it because of our limited perception. We have to learn to see what is surrounding us. The exegesis was not a waste of time, Dick decides, because it led to him figuring all this out.