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
Antisemitism and the New Testament among Gentiles loyal to the Roman empire, to understand how the story of Jesus came to be recast in an anti-Jewish form as the Gospels took their final form. Some scholars assert that critical verses in the New Testament have been used to incite prejudice and violence against Jewish people. Professor Lillian C. Freudmann, author of "Antisemitism in the New Testament" (University Press of America, 1994) has published a study of such verses and the effects that they have had in the Christian community throughout history. Similar studies have been made by both Christian and Jewish scholars, including, Professors Clark