Dick now thinks that what invaded him in 3-74 was himself as an “eternal unique idea.”
Timothy Archer is based on Dick’s friend Jim Pike, the media-savvy, liberal Bishop of California in the late 50s and early 60s. Pike claimed to have been visited by his son after his son’s death, which is mirrored in The Transmigration of Timothy Archer. Dick wrestles with the themes of that book: the impossibility of knowing truth and communicating truth to others. The final message of the book is that inner peace is possible, but it will not come from intellectual knowledge.
Dick is finished with Transmigration and calls it the 3rd book of the trilogy. He claims it is the most important as it documents the Parousia (aka the second coming of Christ) and completes the story arc of VALIS and The Divine Invasion. Jim Pike returned to him just as Bill in the book was taken over by the Holy Spirit, and just how Elijah in the Old Testament passed on a part of his spirit to Elisha.
Everything Dick wrote over the previous 35 years led to Transmigration. He declares it the best novel he has ever written, and from a literary standpoint I would agree. The narrator Angel Archer came from a particular style he was aiming for, and he ties that to the idea that information can create a unique being. He goes so far as to say that Jim Pike, through him, conjured up that character, since she understands the bishop so well.
VALIS, Divine Invasion and Transmigration all point to the fact that the second coming is already here, although it is Jim who has been resurrected, not Christ.