In Part IV of this series, we move forward from the New Testament into the time of the early Church and ask the question: Do we see the early Christians practicing sola scriptura? Do we find the fathers of the early Church practicing and teaching sola scriptura? If not, what do they teach and how did Christians living in the second, third, fourth and fifth centuries of Christian history know what to believe as Christians? You may be surprised to hear what the fathers of the Church have to say about how a Christian can know he holds the true teachings of the faith.