There were many ways in which Christianity was made more popular among Roman pagans. For instance, early mystery cults made the Romans more prepared to accept something like Christianity once it made its appearance. The Roman persecutions of Jews and Christians had the unintended consequence of producing a vast and well-known list of saints and martyrs. The Jews had also allowed Christians to use their synagogues Using the language and techniques of Greek philosophy, Christian intellectuals changed Christianity from a simple ethical creed into a theoretical system. From this "Hellenization of Christianity," theology was born. Christ was depicted as the divine Logos (reason) in human form. Roman Stoicism was incorporated into the belief that all are equal and united in Christ. Christianity was also a religion of the written word. It was a religion of the book. The Jews gave the west its oral history in the thirty-nine books of the Old Testament, written in Hebrew. And by the end of the second century, Christianity had the twenty-seven books of the New Testament, written in Greek. By the 5th century, complete editions of the Old Testament and New Testament were rare, bulky and expensive. What was usually printed were sections of the Bible: the first five books of the Old Testament (the Pentateuch) and the book of Psalms, and the first four books of the New Testament (the Gospels), the Epistles of St. Paul and the Acts of the Apostles