"Let nothing exist among you that may divide you; but be ye united with your bishop..."
Today is the memorial of Saint Ignatius, bishop of Antioch, who followed St. Peter as bishop in that place. He left for us seven letters, which he wrote during his journey to Rome to be martyred. This is some of what he left to us:
to the Magnesians:
I exhort you to study to do all things with a divine harmony, while your bishop presides in the place of God, and your presbyters in the place of the assembly of the apostles, along with your deacons, who are most dear to me, and are entrusted with the ministry of Jesus Christ, who was with the Father before the beginning of time, and in the end was revealed. Do ye all then, imitating the same divine conduct, pay respect to one another, and let no one look upon his neighbour after the flesh, but do ye continually love each other in Jesus Christ. Let nothing exist among you that may divide you ; but be ye united with your bishop, and those that preside over you, as a type and evidence of your immortality.
As therefore the Lord did nothing without the Father, being united to Him, neither by Himself nor by the apostles, so neither do ye anything without the bishop and presbyters. Neither endeavour that anything appear reasonable and proper to yourselves apart; but being come together into the same place, let there be one prayer, one supplication, one mind, one hope, in love and in joy undefiled. There is one Jesus Christ, than whom nothing is more excellent. Do ye therefore all run together as into one temple of God, as to one altar, as to one Jesus Christ, who came forth from one Father, and is with and has gone to one.
and to the Philadelphians:
Wherefore, as children of light and truth, flee from division and wicked doctrines; but where the shepherd is, there do ye as sheep follow. For there are many wolves that appear worthy of credit, who, by means of a pernicious pleasure, carry captive those that are running towards God; but in your unity they shall have no place.
Keep yourselves from those evil plants which Jesus Christ does not tend, because they are not the planting of the Father. Not that I have found any division among you, but exceeding purity. For as many as are of God and of Jesus Christ are also with the bishop. And as many as shall, in the exercise of repentance, return into the unity of the Church, these, too, shall belong to God, that they may live according to Jesus Christ. Do not err, my brethren. If any man follows him that makes a schism in the Church, he shall not inherit the kingdom of God. If any one walks according to a strange opinion, he agrees not with the passion [of Christ.].
Take ye heed, then, to have but one Eucharist. For there is one flesh of our Lord Jesus Christ, and one cup to [show forth] the unity of His blood; one altar; as there is one bishop, along with the presbytery and deacons, my fellow-servants: that so, whatsoever ye do, ye may do it according to [the will of] God.