Dick’s biggest fear is that he will fall through the universe, but he trusts YHWH will protect him and keep his 3-74 dreamlike state from happening again. Partially blaming his amphetamine habit he says prior to 3-74 he had been speeding up relative to real time until he used time up completely and passed outside of time. He credits the lithium he was taking with slowing him down, except he came to rest in the upper realm. At that point he was far in the future. Christ entered him, he saw the world as the BIP, and Thomas (who he now says is a future, not past, self) took over.
Christ renewed him in 3-74, adding new energy into a closed system. This introduction of new information changed the script of reality. Dick points out a flaw in Spinoza’s deterministic view of the world. Spinoza doesn’t account for entropy. The only thing keeping a deterministic world from running down is new energy from Christ.
Reality isn’t changed directly. It changes when the signal which creates reality is altered. That is Valis’s role. What Dick witnessed was a purposeful updating of the mechanistic universe which means the future no longer flowed from the past.
He wonders if he existed in a fugue state until 1970 when a mescaline trip caused a psychotic break. In 1974 his fugue state broke completely and Thomas took over showing him what is real.
He has a hypnagogic vision involving looming punishment for a list of his crimes while he waits for a messenger to arrive with a record that will save him. He interprets this as a model for a cybernetic system related to his 3-74 experience. Christ intervened and interrupted the flow of the signal with a blank slate that atoned for Dick’s full list of sins.