" At times, however, this special aura of authority could present problems for Christianity as some of the apostles’ successors introduced their own ideas into the stream of early theology. As we will see, occasionally these fathers of the generation after the apostles gave the gospel their own unique interpretations that began to turn it away from the great themes of grace and faith so strongly emphasized by Paul and other apostles and more toward the gospel as a “new law” of God-pleasing conduct and behavior. "

― Roger E. Olson , The Story of Christian Theology: Twenty Centuries of Tradition Reform