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
Aramaic New Testament generally had a strong agreement that the New Testament was written in Greek and that an Aramaic source text was used for portions of the New Testament, especially the gospels. They acknowledge that many individual sayings of Jesus as found in the Greek Gospels may be translations from an Aramaic source referred to as "Q", but hold that the Gospels' text in its current form was composed in Greek, and so were the other New Testament writings. Scholars of all stripes have acknowledged the presence of scattered Aramaic expressions, written phonetically and then translated, in the Greek New Testament. Although