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
Sermon on the Mount New Testament, and has been one of the most widely quoted elements of the Canonical Gospels. It includes some of the best known teachings of Jesus, such as the Beatitudes, and the widely recited Lord's Prayer. The Sermon on the Mount is generally considered to contain the central tenets of Christian discipleship. The Sermon on the Mount is Jesus' longest speech and teaching in the New Testament, and occupies chapters 5, 6 and 7 of the Gospel of Matthew. The Sermon has been one of the most widely quoted elements of the Canonical Gospels. This is the first of the