Development of the New Testament canon a novelty in Irenaeus's time. "Against Heresies" 3.11.7 acknowledges that many heterodox Christians use only one gospel while 3.11.9 acknowledges that some use more than four. The success of Tatian's Diatessaron in about the same time period is "...a powerful indication that the fourfold Gospel contemporaneously sponsored by Irenaeus was not broadly, let alone universally, recognized." Irenaeus apparently quotes from 21 of the New Testament books and names the author he thought wrote the text. He mentions the four gospels, Acts, the Pauline epistles with the exception of Hebrews and Philemon, as well as the first epistle of Peter, and
New Testament intended to convey. It will vary slightly depending on whether the focus is on the Old Testament, the letters of the New Testament, or the Canonical Gospels. It also plays an important role in the quest for the historical Jesus. It also addresses the physical text, including the meaning of the words and the way in which they are used, its preservation, history, and integrity. Biblical criticism draws upon a wide range of scholarly disciplines including archaeology, anthropology, folklore, linguistics, Oral Tradition studies, history, and religious studies. The textual variation among manuscript copies of books in the New Testament prompted