Dick’s model of reality (“a total system that perpetually chooses through a binary process of rejection that is cumulative”) is based only on his own experience. He’s not interested in any existing traditions or explanations about the nature of God. All he can concern himself with is whether it is true when it comes to what happened to him. He describes his scientific method of testing his experience against his model and iterating if it doesn’t fit. He wants and expects his experience to have changed him.
Christ is the necessary intruder that allows us to see the Palm Tree Garden, since reality never changes, only our perception of it. Perhaps because it was Easter Dick saw the garden the previous week but has lost his way back, even though he knows it exists. He felt burned out from exhaustion the night before he ended up in the spatial realm, similar to his feeling of running out of time, and then he woke in the garden world. He connects his spiritual rebirth to the celebration of Christ’s resurrection.
He wonders if his concept of binary branching creates endless new realities… if so what happens to them?
He has a dream about some children called “the Spinners” who are poisoned by heavy metals on a farm and are slowly going blind. In his interpretation the Spinners are immortals who came here, lost their third eye and are no longer able to see Christ.