John Chrysostom

You have received as your patrimony the desire never to allow the teachings of our faith to degenerate into heresy. What makes this clear? In the time of your ancestors, people came here from Judea who were muddying the clear waters of the doctrine taught by the apostles. They were exhorting your ancestors to practice circumcision and to observe the Mosaic law. Those who then lived in your city did not remain silent, nor did they put up with this innovation. They were like courageous hounds who saw wolves attacking and destroying the entire flock. They sprang after the wolves and did not let up chasing them and driving them away. They saw to it that the apostles from every corner of the world sent them their decision in the form of a letter that would protect them from any attack launched against the faithful by those innovators and all such as might come thereafter.