The letters to the various churches were written by an Apostle .
``  Paul of Tarsus , a 1st-century Pharisaic Jew who experienced a conversion to faith in Jesus , dictated letters to various churches and individuals from c. 48ï¿½68.Joseph Barber Lightfoot in his Commentary on the Epistle to the Galatians writes : `` '' At this point the apostle takes the pen from his amanuensis , and the concluding paragraph is written with his own hand . ''
Historical reliability of the Gospels