St. Ignatius of Antioch: Letter to the Philadelphians:
Ignatius, who is also called Theophorus, to the Church of God the Father, and our Lord Jesus Christ, which is at Philadelphia, in Asia, which has obtained mercy, and is established in the harmony of God, and rejoiceth unceasingly in the passion of our Lord, and is filled with all mercy through his resurrection; which I salute in the blood of Jesus Christ, who is our eternal and enduring joy, especially if [men] are in unity with the bishop, the presbyters, and the deacons, who have been appointed according to the mind of Jesus Christ, whom He has established in security, after His own will, and by His Holy Spirit.
CHAPTER I.--PRAISE OF THE BISHOP.
Which bishop, I know, obtained the ministry which pertains to the common [weal], not of himself, neither by men, nor through vainglory, but by the love of God the Father, and the Lord Jesus Christ; at whose meekness I am struck with admiration, and who by his silence is able to accomplish more than those who vainly talk. For he is in harmony with the commandments [of God], even as the harp is with its strings. Wherefore my soul declares his mind towards God a happy one, knowing it to be virtuous and perfect, and that his stability as well as freedom from all anger is after the example of the infinite meekness of the living God.
CHAPTER II.--MAINTAIN UNION WITH THE BISHOP.
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 captives those that are running towards God; but in your unity they shall have no place.
CHAPTER III.--AVOID SCHISMATICS.
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.].
CHAPTER IV.--HAVE BUT ONE EUCHARIST, ETC.
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.
