35 Wherefore, my brother, refrain from gathering together against divine testimonies so many, so perspicuous, and so unchallenged, the calumnies which may be found in the writings of bishops either of our communion, as Hilary, or of the undivided Church itself in the age preceding the schism of Donatus, as Cyprian or Agrippinus; because, in the first place, this class of writings must be, so far as authority is concerned, distinguished from the canon of Scripture. For they are not read by us as if a testimony brought forward from them was such that it would be unlawful to hold any different opinion, for it may be that the opinions which they held were different from those to which truth demands our assent. For we are among those who do not reject what has been taught us even by an apostle: “If in anything ye be otherwise minded, God shall reveal even this unto you; nevertheless, whereto we have already attained, let us walk by the same rule,” — in that way, namely, which Christ is; of which way the Psalmist thus speaks: “God be merciful unto us, and bless us, and cause His face to shine upon us: that Your way may be known upon earth, Your saving health among all nations.”
36. In the next place, if you are charmed by the authority of that bishop and illustrious martyr St. Cyprian, which we indeed regard, as I have said, as quite distinct from the authority of canonical Scripture, why are you not charmed by such things in him as these: that he maintained with loyalty, and defended in debate, the unity of the Church in the world and in all nations; that he censured, as full of self-sufficiency and pride, those who wished to separate themselves as righteous from the Church, holding them up to ridicule for assuming to themselves that which the Lord did not concede even to apostles—namely, the gathering of the tares before the harvest—and for attempting to separate the chaff from the wheat, as if to them had been assigned the charge of removing the chaff and cleansing the threshing-floor; that he proved that no man can be stained with guilt by the sins of others, thus sweeping away the only ground alleged by the authors of schism for their separation; that in the very matter in regard to which he was of a different opinion from his colleagues, he did not decree that those who thought otherwise than he did should be condemned or excommunicated; that even in his letter to Jubaianus (which was read for the first time in the Council, the authority of which you are wont to plead in defence of the practice of rebaptizing), although he admits that in time past persons who had been baptized in other communions had been received into the Church without being a second time baptized, on which ground they were regarded by him as having had no baptism, nevertheless he considers the use and benefit of peace within the Church to be so great, that for its sake he holds that these persons (though in his judgment unbaptized) should not be excluded from office in the Church?
37. And by this you will very readily perceive (for I know the acuteness of your mind) that your cause is completely subverted and annihilated. For if, as you suppose, the Church which had been spread abroad throughout the world perished through her admitting sinners to partake in her sacraments (and this is the ground alleged for your separation), it had wholly perished long before—at the time, namely, when, as Cyprian says, men were admitted into it without baptism—and thus Cyprian himself had no Church within which to be born; and if so, how much more must this have been the case with one who, like Donatus, the author of your schism, and the father of your sect, belonged to a later age! But if at that time, although persons were being admitted into the Church without baptism, the Church nevertheless remained in being, so as to give birth to Cyprian and afterwards to Donatus, it is manifest that the righteous are not defiled by the sins of other men when they participate with them in the sacraments. And thus you have no excuse by which you can wash away the guilt of the schism whereby you have gone forth from the unity of the Church; and in you is fulfilled that saying of Holy Writ: “There is a generation that esteem themselves right, and have not cleansed themselves from the guilt of their going forth.”
38. The man who, out of regard to the sameness of the sacraments, does not presume to insist on the second administration of baptism even to heretics, is not, by thus avoiding Cyprian's error, placed on a level with Cyprian in merit, any more than the man who does not insist upon the Gentiles conforming to Jewish ceremonies is thereby placed on a level in merit with the Apostle Peter. In Peter's case, however, the record not only of his halting, but also of his correction, is contained in the canonical Scriptures; whereas the statement that Cyprian entertained opinions at variance with those approved by the constitution and practice of the Church is found, not in canonical Scripture, but in his own writings, and in those of a Council; and although it is not found in the same records that he corrected that opinion, it is nevertheless by no means an unreasonable supposition that he did correct it, and that this fact may perhaps have been suppressed by those who were too much pleased with the error into which he fell, and were unwilling to lose the patronage of so great a name. At the same time, there are not wanting some who maintain that Cyprian never held the view ascribed to him, but that this was an unwarrantable forgery passed off by liars under his name. For it was impossible for the integrity and authenticity of the writings of any one bishop, however illustrious, to be secured and preserved as the canonical Scriptures are through translation into so many languages, and through the regular and continuous manner in which the Church has used them in public worship. Even in the face of this, some have been found forging many things under the names of the apostles. It is true, indeed, that they made such attempts in vain, because the text of canonical Scripture was so well attested, and so generally used and known; but this effort of an unholy boldness, which has not forborne to assail writings which are defended by the strength of such notoriety, has proved what it is capable of essaying against writings which are not established upon canonical authority.
39. We, however, do not deny that Cyprian held the views ascribed to him: first, because his style has a certain peculiarity of expression by which it may be recognised; and secondly, because in this case our cause rather than yours is proved victorious, and the pretext alleged for your schism— namely, that you might not be defiled by the sins of other men— is in the most simple manner exploded; since it is manifest from the letters of Cyprian that participation in the sacraments was allowed to sinful men, when those who, in your judgment (and as you will have it, in his judgment also), were unbaptized were as such admitted to the Church, and that nevertheless the Church did not perish, but remained in the dignity belonging to her nature as the Lord's wheat scattered throughout the world. And, therefore, if in your consternation you thus betake yourselves to Cyprian's authority as to a harbour of refuge, you see the rock against which your error dashes itself in this course; if, on the other hand, you do not venture to flee there, you are wrecked without any struggle for escape.
Source: Letters (New Advent)