Epistles in the New Testament written by or attributed to St. Paul. Probably the earliest was Paul 's Epistles to the Thessalonians, dating from Corinth in ad 52 or 53. Most scholars agree that these were almost certainly the work of the apostle, as were 1 and 2 Corinthians, Galatians, Romans,
Ephesians, Philippians, Colossians, and Philemon. The so - called Pastoral Epistles, directed primarily at the Christian clergy, are 1 and 2 Timothy and Titus; it is generally agreed that they are the work of one writer, but most modern scholars doubt that it was Paul. Attribution to Paul of the Epistle to the Hebrews has been almost unanimously refuted.
Paul's teachings established clear theological doctrines about God as father, both to Jesus and to all creation, about Original Sin, and the existence of the Holy Spirit. The Epistles also formed the basis for later Christian interpretations of forgiveness and grace, justification by faith, and the use of the sacraments.