New Testament supporting the Trinity doctrine in 1 John to have been a later addition. According to Norman Geisler and William Nix, "The New Testament, then, has not only survived in more manuscripts than any other book from antiquity, but it has survived in a purer form than any other great book—a form that is 99.5% pure" The often referred to Interpreter's Dictionary of the Bible, a book written to prove the validity of the New Testament, says: " A study of 150 Greek [manuscripts] of the Gospel of Luke has revealed more than 30,000 different readings... It is safe to say
Gospel of Peter in the canonical gospels was transmitted orally, through readings in the churches, i.e. that the text is based on what the author "remembers" about the other gospels, together with his own embellishments. Ron Cameron and others have further speculated the Gospel of Peter was written independently of the synoptic gospels using an early proto-gospel. A consequence of this is the potential existence of a source text that formed the basis of the passion narratives in Matthew, Luke, and Mark, as well as in Peter. Origen makes mention of the Gospel of Peter as agreeing with the tradition of the Hebrews.