We are not sure who wrote this letter to the Hebrews. Tertullian (150-230 A.D.) suggested that Barnabas wrote it, while Martin Luther thought it was Apollos. Other suggestions have been Priscilla or Philip. The consensus, though, is that Paul wrote it, though it does not contain his signature greeting. Whoever wrote it, it is obvious that the reason it was written was to reassure the Hebrew Christians that their faith in the Messiah was supported by the Old Testament prophecies and types. It stresses the priesthood of Christ, which did away with the Jewish system of sacrifice.