The task of teaching was entrusted to bishops, then to priests and clergymen in general, as we will mention in detail in due course, since the Law is sought from the mouth of the clergyman.
Holy councils of bishops were formed and had the authority to legislate laws and canons in the holy Church. The replies of many of the bishops on religious affairs were considered sacred canons recognised by the Universal Church. A vivid example of this is what occurred during the visit of Pope Timothy Alexandrus, the 22nd Pope of Constantinople, to the Ecumenical Council held in 381 A. D. All his replies were considered Church canons. (See Volume 14 of Nicene and Post Nicene Fathers series).