in the early church was its link with the authority of Jesus through its apostolicity. What does apostolicity mean? Everyone agrees that it does not mean simply “written by an apostle,” because the term is applied to books such as the Gospels of Mark and Luke, which were not written by apostles but by people in close association with an apostle (Luke with Paul, and Mark with Peter). But apostolicity, as a force that compelled the affirmation of the early church, probably means more than “written