Tertullian of Carthage was one of the earliest major Christian theologians writing in Latin. His energetic arguments defended Christians against public accusations and challenged teachings he considered incompatible with the apostolic faith. He insisted that Christianity made claims about real events, bodily existence, and moral conduct rather than merely offering abstract speculation.
He wrote extensively about repentance, baptism, prayer, marriage, discipline, and martyrdom. His later writings reflect increasingly rigorous expectations of Christian conduct, especially in connection with the New Prophecy movement commonly called Montanism.