The epistles of St Paul Paul is generally known as an apostle to the Gentiles. It has been shown that he wrote about two-thirds of the New Testament. He wrote many letters as a means of encouraging believers and sustaining the faith in God through Jesus Christ. Among the epistles are: Letters to the Romans, (I and II) Corinthians, Galatians, Ephesians, Philippians, Colossians, (I and II) Thessalonians, (I and II) Timothy, Titus, and Philemon. Paul was indeed uniting the Christians in these communities through his letters.