St. Paul's opponents and their background : a study of apocalyptic and Jewish sectarian teachings - Gunther, John J. (Leiden : E.J. Brill, 1973)
Sources -- Judaic legalism -- Asceticism -- Sacerdotal separatism -- Angelology -- Messianism and pneumatology -- Apocalyptic, mystic Gnosticism -- Apostolic authority -- 2 Corinthians 6:14-7:1.
Keywords: Paul, the Apostle, Saint.Jewish sects.Bible. Epistles of Paul -- Theology