15. And indeed, before those laws were put in force by the emperors of the Catholic faith, the doctrine of the peace and unity of Christ was beginning by degrees to gain ground, and men were coming over to it even from the faction of Donatus, in proportion as each learned more, and became more willing, and more master of his own actions; although, at the same time, among the Donatists herds of abandoned men were disturbing the peace of the innocent for one reason or another in the spirit of the most reckless madness. What master was there who was not compelled to live in dread of his own servant, if he had put himself under the guardianship of the Donatists? Who dared even threaten one who sought his ruin with punishment? Who dared to exact payment of a debt from one who consumed his stores, or from any debtor whatsoever, that sought their assistance or protection? Under the threat of beating, and burning, and immediate death, all documents compromising the worst of slaves were destroyed, that they might depart in freedom. Notes of hand that had been extracted from debtors were returned to them. Any one who had shown a contempt for their hard words were compelled by harder blows to do what they desired. The houses of innocent persons who had offended them were either razed to the ground or burned. Certain heads of families of honorable parentage, and brought up with a good education were carried away half dead after their deeds of violence, or bound to the mill, and compelled by blows to turn it round, after the fashion of the meanest beasts of burden. For what assistance from the laws rendered by the civil powers was ever of any avail against them? What official ever ventured so much as to breathe in their presence? What agents ever exacted payment of a debt which they had been unwilling to discharge? Who ever endeavored to avenge those who were put to death in their massacres? Except, indeed, that their own madness took revenge on them, when some, by provoking against themselves the swords of men, whom they obliged to kill them under fear of instant death, others by throwing themselves over sundry precipices, others by waters, others by fire, gave themselves over on the several occasions to a voluntary death, and gave up their lives as offerings to the dead by punishments inflicted with their own hands upon themselves.

16. These deeds were looked upon with horror by many who were firmly rooted in the same superstitious heresy; and accordingly, when they supposed that it was sufficient to establish their innocence that they were ill contented with such conduct, it was urged against them by the Catholics: If these evil deeds do not pollute your innocence, how then do you maintain that the whole Christian world has been polluted by the alleged sin of Cæcilianus, which are either altogether calumnies, or at least not proved against him? How come you, by a deed of gross impiety, to separate yourselves from the unity of the Catholic Church, as from the threshing-floor of the Lord, which must needs contain, up to the time of the final winnowing, both corn which is to be stored in the garner, and chaff that is to be burned up with fire? And thus some were so convinced by argument as to come over to the unity of the Catholic Church, being prepared even to meet the hostility of abandoned men; whilst the greater number, though equally convinced, and though desirous to do the same, yet dared not make enemies of these men, who were so unbridled in their violence, seeing that some who had come over to us experienced the greatest cruelty at their hands.

Nicene and Post-Nicene Fathers: Series I/Volume IV/Donatist Controversy/The Correction of the Donatists/Chapter 4