16 You now see therefore, I suppose, that the thing to be considered when any one is coerced, is not the mere fact of the coercion, but the nature of that to which he is coerced, whether it be good or bad: not that any one can be good in spite of his own will, but that, through fear of suffering what he does not desire, he either renounces his hostile prejudices, or is compelled to examine truth of which he had been contentedly ignorant; and under the influence of this fear repudiates the error which he was wont to defend, or seeks the truth of which he formerly knew nothing, and now willingly holds what he formerly rejected. Perhaps it would be utterly useless to assert this in words, if it were not demonstrated by so many examples. We see not a few men here and there, but many cities, once Donatist, now Catholic, vehemently detesting the diabolical schism, and ardently loving the unity of the Church; and these became Catholic under the influence of that fear which is to you so offensive by the laws of emperors, from Constantine, before whom your party of their own accord impeached Cæcilianus, down to the emperors of our own time, who most justly decree that the decision of the judge whom your own party chose, and whom they preferred to a tribunal of bishops, should be maintained in force against you.
17. I have therefore yielded to the evidence afforded by these instances which my colleagues have laid before me. For originally my opinion was, that no one should be coerced into the unity of Christ, that we must act only by words, fight only by arguments, and prevail by force of reason, lest we should have those whom we knew as avowed heretics feigning themselves to be Catholics. But this opinion of mine was overcome not by the words of those who controverted it, but by the conclusive instances to which they could point. For, in the first place, there was set over against my opinion my own town, which, although it was once wholly on the side of Donatus, was brought over to the Catholic unity by fear of the imperial edicts, but which we now see filled with such detestation of your ruinous perversity, that it would scarcely be believed that it had ever been involved in your error. There were so many others which were mentioned to me by name, that, from facts themselves, I was made to own that to this matter the word of Scripture might be understood as applying: “Give opportunity to a wise man, and he will be yet wiser.” For how many were already, as we assuredly know, willing to be Catholics, being moved by the indisputable plainness of truth, but daily putting off their avowal of this through fear of offending their own party! How many were bound, not by truth— for you never pretended to that as yours— but by the heavy chains of inveterate custom, so that in them was fulfilled the divine saying: “A servant (who is hardened) will not be corrected by words; for though he understand, he will not answer”! How many supposed the sect of Donatus to be the true Church, merely because ease had made them too listless, or conceited, or sluggish, to take pains to examine Catholic truth! How many would have entered earlier had not the calumnies of slanderers, who declared that we offered something else than we do upon the altar of God, shut them out! How many, believing that it mattered not to which party a Christian might belong, remained in the schism of Donatus only because they had been born in it, and no one was compelling them to forsake it and pass over into the Catholic Church!
18. To all these classes of persons the dread of those laws in the promulgation of which kings serve the Lord in fear has been so useful, that now some say we were willing for this some time ago; but thanks be to God, who has given us occasion for doing it at once, and has cut off the hesitancy of procrastination! Others say: We already knew this to be true, but we were held prisoners by the force of old custom: thanks be to the Lord, who has broken these bonds asunder, and has brought us into the bond of peace! Others say: We knew not that the truth was here, and we had no wish to learn it; but fear made us become earnest to examine it when we became alarmed, lest, without any gain in things eternal, we should be smitten with loss in temporal things: thanks be to the Lord, who has by the stimulus of fear startled us from our negligence, that now being disquieted we might inquire into those things which, when at ease, we did not care to know! Others say: We were prevented from entering the Church by false reports, which we could not know to be false unless we entered it; and we would not enter unless we were compelled: thanks be to the Lord, who by His scourge took away our timid hesitation, and taught us to find out for ourselves how vain and absurd were the lies which rumour had spread abroad against His Church: by this we are persuaded that there is no truth in the accusations made by the authors of this heresy, since the more serious charges which their followers have invented are without foundation. Others say: We thought, indeed, that it mattered not in what communion we held the faith of Christ; but thanks to the Lord, who has gathered us in from a state of schism, and has taught us that it is fitting that the one God be worshipped in unity.
19. Could I therefore maintain opposition to my colleagues, and by resisting them stand in the way of such conquests of the Lord, and prevent the sheep of Christ which were wandering on your mountains and hills— that is, on the swellings of your pride— from being gathered into the fold of peace, in which there is one flock and one Shepherd? Was it my duty to obstruct these measures, in order, forsooth, that you might not lose what you call your own, and might without fear rob Christ of what is His: that you might frame your testaments according to Roman law, and might by calumnious accusations break the Testament made with the sanction of Divine law to the fathers, in which it was written, “In your seed shall all the nations of the earth be blessed”: that you might have freedom in your transactions in the way of buying and selling, and might be emboldened to divide and claim as your own that which Christ bought by giving Himself as its price: that any gift made over by one of you to another might remain unchallenged, and that the gift which the God of gods has bestowed upon His children, called from the rising of the sun to the going down thereof, might become invalid: that you might not be sent into exile from the land of your natural birth, and that you might labour to banish Christ from the kingdom bought with His blood, which extends from sea to sea, and from the river to the ends of the earth? Nay verily; let the kings of the earth serve Christ by making laws for Him and for His cause. Your predecessors exposed Cæcilianus and his companions to be punished by the kings of the earth for crimes with which they were falsely charged: let the lions now be turned to break in pieces the bones of the calumniators, and let no intercession for them be made by Daniel when he has been proved innocent, and set free from the den in which they meet their doom; for he that prepares a pit for his neighbour shall himself most justly fall into it.
Source: Letters (New Advent)