'The Epistle of Barnabas' is a Greek epistle written between AD 70 and 132. The complete text is preserved in the 4th-century Codex Sinaiticus, where it appears immediately after the New Testament and before the Shepherd of Hermas. The main message of the Epistle of Barnabas is that the Jewish scriptures — what would become the Old Testament in Christianity — were actually Christian documents from...