“‘Apart from the bishop, let no one do anything pertaining to the Church. Let that be considered a valid Eucharist which is celebrated by the bishop or by a person appointed by him. Let the people be present wherever the bishop appears, just as the catholic Church is wherever Jesus Christ is. Apart from the bishop it is not lawful either to baptize or to celebrate a Eucharist, but whatever he may approve is also pleasing to God, so that whatever you do may be sure and valid.’ (St. Ignatius of Antioch – d. 107 AD)
It was perhaps in the eucharistic liturgy that the leading role of the bishop could best be discerned. Ordinarily he alone presided. As he prayed aloud at the altar, the presbyters stood silently on either side of him, while the deacons assisted him in such matters as the distribution of the consecrated bread, or saw to it that order was maintained in the church. From his cathedra, the chair that was the symbol of his teaching authority and that was usually situated at the center of the back wall of the sanctuary, and flanked by the presbyters’ benches, he was accustomed to preach. This was the bishop’s most important task, and, until about the beginning of the sixth century, it was only infrequently that priests and deacons preached.” (Boniface Ramsey, Beginning to Read the Fathers, p. 115).