St. Alexander of Alexandria
Epistles on the Arian Heresy and the Deposition of Arius
Chapter 1
To Alexander, Bishop of the City of Constantinople
13 These things in part have I written in this epistle, thinking it burdensome to write out each accurately, even as I said before, because they escape not your religious diligence. Thus do we teach, thus do we preach. These are the apostolic doctrines of the Church, for which also we die, esteeming those but little who would compel us to forswear them, even if they would force us by tortures, and not casting away our hope in them. To these Arius and Achilles opposing themselves, and those who with them are the enemies of the truth, have been expelled from the Church, as being aliens from our holy doctrine, according to the blessed Paul, who says, “If any man preach any other gospel unto you than that you have received, let him be accursed; even though he feign himself an angel from heaven.” And also, “If any man teach otherwise, and consent not to the wholesome words of our Lord Jesus Christ, and to the doctrine which is according to godliness; he is proud, knowing nothing,” and so forth. These, therefore, who have been anathematized by the brotherhood, let no one of you receive, nor admit of those things which are either said or written by them. For these seducers do always lie, nor will they ever speak the truth. They go about the cities, attempting nothing else but that under the mark of friendship and the name of peace, by their hypocrisy and blandishments, they may give and receive letters, to deceive by means of these a few “silly women, and laden with sins, who have been led captive by them,” and so forth.
14. These men, therefore, who have dared such things against Christ; who have partly in public derided the Christian religion; partly seek to traduce and inform against its professors before the judgment-seats; who in a time of peace, as far as in them lies, have stirred up a persecution against us; who have enervated the ineffable mystery of Christ's generation; from these, I say, beloved and like-minded brethren, turning away in aversion, give your suffrages with us against their mad daring; even as our colleagues have done, who being moved with indignation, have both written to us letters against these men, and have subscribed our letter. Which also I have sent unto you by my son Apion the deacon, being some of them from the whole of Egypt and the Thebaid, some from Libya and Pentapolis. There are others also from Syria, Lycia, Pamphylia, Asia, Cappadocia, and the other neighbouring provinces. After the example of which I trust also that I shall receive letters from you. For though I have prepared many helps towards curing those who have suffered injury, this is the special remedy that has been devised for healing the multitudes that have been deceived by them, that they may comply with the general consent of our colleagues, and thus hasten to return to repentance. Salute one another, together with the brethren who are with you. I pray that you may be strong in the Lord, beloved, and that I may profit by your love towards Christ.
Source: Epistles on the Arian Heresy and the Deposition of Arius (New Advent)