Christianity and the book
In books surviving from the first four centuries ad, codices more often contained Christian writings, whereas pagan works were usually written on rolls. Several points in the Christian use of books contributed to a preference for vellum and the codex. First, Christianity was rooted in Judaism, which for centuries had revered sacred writings. The Christians retained the Jewish Scriptures and added some writings of their own, collected in a New Testament. There was strong motivation for preserving these unchanging words on the most durable materials, and vellum was more durable than papyrus. Second, in referring to their sacred writings the Christians made comparative studies of sources. The writings were related, and students liked to refer from one source to another. This reference entailed having a comparatively large volume of writings available and increased the attractiveness of the easy turning of pages possible with a codex. In this respect it is noteworthy that Roman legal scholarship, which also required a comparison of sources, likewise showed an early preference for the codex. A third point was the expressed intention of early Christians to shun pagan literature by using an entirely different form of book. Conversely the clinging of the pagan authors to an outmoded form may be ascribed in part to a conservative resistance to the Christian ideas.
The social potential of books was illustrated by the Christian emphasis on their dissemination. Christianity, which aimed at universality, produced a stream of books, whereas the literary remains of pagan religions are scarce. The process of introducing the universal religion throughout the Roman Empire extended over three centuries, covered thousands of miles, and embraced peoples of the most varied backgrounds and individuals of the greatest differences in rank. The worldwide outlook thus led to a greater dependence on books. Biblical texts and translations, commentaries, polemical tracts, and pamphlets were important in the circumstances, not only to record belief but also to disseminate and explain it.
By the 4th century, the same time that the vellum codex had superseded the papyrus roll, the Christian book had replaced the pagan book in every form. Little of importance was written in the classical tradition after ad 100. The greatest writers of the following three centuries were Christian scholars such as Origen, Pamphilus of Caesarea, Tertullian, St. Augustine, and St. Jerome. Of all Christian books, however, the most numerous survivals are New Testament codices and apocryphal New Testament writings.