In the second sermon on Ps. cii. (ci.) preached about this time, when enlarging upon the unity he ridicules the Donatist assertion that the Church which was among all the nations had perished, as the impudent voice of those who are not in it declares. So is their affirmation that Scripture prophecies about the spread of the kingdom have been fulfilled; all nations have believed, but this diffused communion apostatized and perished. He rebukes the conceit that the Lord's saying, I am with you, even to the end of the world, was designed for them alone, the Lord foreseeing that the party of Donatus would be in the earth. If emperors have propounded laws against heretics, it is a part of the predictions which foretold how kings would serve the Lord. Thence he expands the notes of universality and perpetuity.
Cresconius, a layman and philologist, read Augustin's first book in answer to Petilian, and wrote a reply, which, however, was circulated among the Donatists only. Augustin at last secured a copy, and wrote (406 A.D., some say as late as 409) Contra Cresconium Grammaticum Partis Donati, libri IV. Three of these books controvert the arguments of Cresconius; part of the third and the fourth entire is a detailed polemic history of the Maximian schism.
In Book I. he alludes to the occasion of the writing, and hesitates between being regarded as contumelious if he declined an answer, and arrogant, should he reply. Cresconius had attacked eloquence, which Augustin defends as simply the art of speaking, and as not to be condemned because it has been abused. You do not condemn military armament for your country because others have taken up arms against the country; the physician does not refuse to use all drugs because some are baneful; because there are sophists one is not to deny the value of eloquence. Cresconius seemed to regard its cultivation as injurious to the simplicity of Christian law and teaching. He also had accused Augustin of persistent arrogance in his pertinacious pursuit of the Donatists. Augustin claims to do a good work with good ends in view, and says its fruit has been a rich harvest for the Church. So the discussion passes on to the use of dialectics, which Cresconius assails, but Augustin defends as nothing else than a demonstration of results, either the true from the true or the false from the false. He justifies not disputatiousness, but the arguments by which truth is built up, for Christ employed it, and St. Paul wielded its weapons not only with the Jews but with Epicureans and Stoics. In all this we have an illustration of that unfortunate tendency to undervalue culture whenever a puristic community passes into the fires. Augustin applies the art to one of the points which Cresconius had discussed, viz., rebaptism. He had endeavored to prove that it was solely among them. Augustin concedes that the rite is there, but not its profit; in order to enjoy its profit, it must be administered lawfully. The oneness of baptism as a ceremony is not dependent on the oneness of the Church, whereas its profit is. A reprobate society of heretics can have a good baptism, but it is not properly and not profitably administered among them; the proper and profitable administration is solely in the Church to salvation; the rite outside is to judgment.
In Book II. after a résumé of the previous book, he notices first the criticism as to the true construction of the name Donatistoe; it should rather be Donatiani as Cresconius claimed. He is ready to concede this, and in his controversy with the philologist will use that form, but on all other occasion he would prefer the more familiar termination. Cresconius also protests against the term heretic as applied to them, which he regards as a divergence of views from the Christian faith; while a schism has sprung up among those for whom the same Christ was born, died and rose again, who have one religion, the same sacraments, and no diversity in Christian observance. Augustin, however, while not particularly dwelling on these agreements, presses upon him the articles of divergence, and asks why they rebaptize? The recognition of Donatist ordination concerning which Cresconius had asked, Augustin declares to be a matter of charity. As to the question of Cresconius, Why, if the Donatists are such heretics and so sacrilegious, if they are indeed guilty of a nefarious and inexpiable crime, some purification is not adopted when they come over to the Catholic church? Augustin answers: We do not regard it as inexpiable, and baptism is not to be repeated, it is Christ's; on coming to us the Donatist receives the Spirit signified by that rite; he begins to have healthfully what he previously had hurtfully and unworthily. The relation of the celebrant to the symbol as presented by Cresconius is a modification of Petilianism. "Regard is had," says he, "to the conscience of the giver, not according to its actuality, which cannot be perceived but according to his reputation, whether that be true or false." Augustin does not fail to crowd him for the change of base. The favorite passages of Ps. cxli. 5, Jer. xv. 18, and Ecclus. xxxiv. 31, are gone over. Then he answers the charge made by Cresconius, as to the right of any sinner to baptize among the Catholics. Finally, he reviews Cyprian's relation to rebaptism, who is not a canonical authority for him; the Scriptures alone are such; but the Donatists ought to consider that decision of his to remain in unity from the fact that the mixed nature of its membership requires toleration.
Book III. Augustin contends that the Donatists by their schism from especially the Eastern churches had violated the principle of toleration, which their boasted leader had so strenuously enforced. There follows then a seriatim consideration of the points made by Cresconius, similar to those maintained by Petilian, as to the importance of the origin and the head and root in baptism, or the character of the celebrant, and the rebaptism by Paul of John's disciples. The case of Optatus and the Maximianists next come under review, as witnesses against their testimonies. Cresconius says he will neither absolve nor condemn Optatus, and as to the Maximianists, he professes to have made special inquiry into the whole history. The Synod had granted a season of delay during which all who returned should be held innocent. Of this very many availed themselves; the baptism of these was valid; those who remained outside lost both baptism and the church. Augustin refutes the statement from its inherent contradictions and from the language of the Synod against the Maximianists. Cresconius also brings forward the Sardican council's letter to Donatus as a proof of sustained fellowship. Augustin declares it to be an Arian council; and he insists on paralleling all Cresconius would say about Cæcilianism with the career of the Maximianists. With reference to persecution, he cites in extenso their own persecutions, the case of Severus, bishop of Thubursicubur; the acts of Optatus; his own treatment at a collation by the Circumcelliones; the case of Crispinus, the Donatist bishop of Calama; their own invocation of the state against the Maximianists. Thence he returns to the doctrine of the unity as universal with many of the familiar Scripture texts, and asserts by the documents that the Donatists were the occasion of the rupture.
Book IV. is a review of Cresconius's work by the light of the Maximianist records. Beginning with a pleasantry as to their eloquence and dialectic spirit, he follows in detail the points of Cresconius whether doctrinal or historical as to Cæcilian, mainly with Maximianist data as offsets. Cresconius charges Augustin with having called Petilian Satan, and so violating the peace he professes. Augustin claims that he only compared the error not the person, to Satan. Nor had Cresconius forgotten to bring out the Manichæism of his opponent. Augustin reminds him both of what he had written against them and also of what sins were forgiven in the return of Maximian, who was an old man when Augustin was but young; these were the sins of his youth. The theories of fellowship, of persecution, of baptism, are all considered in the light of their own council of Bagai and its sequences. [Cp. Retractt. II. xxvi.].
After concluding his work against Cresconius, he issued, probably in this same year, a little treatise he had promised, containing a collection of proofs both for Donatist and Catholic popular use. To the pledge itself an unknown Donatist replied, which led to the production of a second book, whose title Augustin designed to be: Contra nescio quem Donatistam. The original promise was fulfilled in the publication of the Probationes et Testimonia contra Donatistas, embracing all the ecclesiastical and public acts and Scripture proofs bearing on the questions between them. It was designed mainly for public reading in the basilicas. Both were joined in one book, although apparently afterwards separated. In each he confesses to the error of placing the purgation of Felix after instead of before the vindication of Cæcilian. At this writing he still regarded the Donatists as psychics and babes, but in his old age corrects his application of the words to them, since he came to consider them rather as dead and lost. Unfortunately neither treatise has been preserved. [Cp. Retractt. II. xxvii. and xxviii.].
He also conceived the plan of preparing a polemic for the people who had little time for extended reading, by refuting the entire theory of the schism through the story of the excision and restoration of the Maximianists. It appeared c. 406 A.D. under the name of Admonitio Donatistarum de Maximianistis: this too is lost. [Cp. Retractt. II. xxix.].
An acquaintance of earlier days in Carthage, Vincentius, had become bishop of the little Rogatist fragment as the immediate successor of Rogatus himself at Cartenna. He, or some one of that little band, had written a letter to Augustin with a pretty strong plea against persecution. This was not unlikely in c. 408 A.D., and Augustin answers in one of his most weighty epistles (Ep. xciii.), under the supposition that Vincentius was the author, and vindicates the help of the State. Evidently a change had come over Numidia, for he boasts of the multitudes who had been converted, and rejoices in the fruitful use of the secular arm for their salvation. Even Circumcelliones had become steadfast Catholics. Coercion stimulates the thoughtless and those bound by custom, and delivers these held back by fear; it is like a wholesome medicine, or the wounds inflicted by a friend. God chastens in order to better the life and to bring men to repentance. The householder instructs us to compel them to come in. Sarah and Hagar are types; so the mother Church corrects her children. Everything depends on the aim in persecution, whether it be done for oppression or for good; it is the difference between Pharaoh and Moses in their treatment of Israel. The Father gave up the Son, and the Son gave Himself up; while Judas betrayed Him. The righteousness of the end for which one suffers alone constitutes martyrdom. The Rogatist is not suffering for righteousness but for unrighteousness. Augustin is constrained to confess that there are no persecutions recorded in the New Testament as inflicted by Christians, but explains the omission as due to the fact that rulers were not yet members of the Church. He thinks, too, that the moderate and discriminating form of the correction employed, helps to justify a resort thereto. If the Rogatists have nothing to do with the violence of the Circumcelliones, and use no force as the rest of the Donatists do, it is because they are so few and feeble. The Donatists, however, did use the secular arm against the Maximianists, and in the appeal to Julian. He will not allow a distinction between resort to law for the recovery of property and for the coercion of the conscience. He claims that to regain one's own in this way has no apostolic warrant. The Donatists, too, sought imperial aid to coerce Cæcilianus. Why shall not Catholics return in kind? The very edict of confiscation which had hit them they had hoped might fall on the head of Cæcilian and his followers. What Tychonius said describes the very essence of Donatist arbitrariness: quod volumus sanctum est. The sin of separation from the whole world followed; the universal church was condemned unheard, and the toleration which Cyprian urged disregarded. He traces his own change of views from the non-coercive to the coercive policy, the success of the method in hastening conversions won him wholly as an enthusiastic and persistent supporter. He bids Vincentius flee from the wrath to come. What is his little handful compared with the universal Church? This note of universality he develops in extenso against their limitation, and especially their new definition of Catholic, as obedience to all the laws and the sacraments, and to their childish allegory of Cant. i. 7. He hints that in the ancient times there might have been a little schism which anticipated the Rogatists, and which had called itself exclusively the Church. He thinks it is also the duty of the State to suppress idolatry. The passage quoted from Hilary by Vincentius, as to the few who in Asia in his day were believers in spite of the spread of the Church, Augustin softens into an excited picture of the dark times of persecution. Next, he discusses the position of Cyprian. All patristic testimony, however, is of no final value; the only authority is the Word of God. Moreover, if Cyprian be quoted, why not on the side of his love for unity and toleration? The averment that the Church, with the exception of the Rogatists, perished by fellowship with the unbaptized, is met with the fact that in Cyprian's time men had been received without rebaptism into the Church, and therefore the Church, according to their theory, must have perished before their day; if it, however, survived that condition, then there is no excuse left for a schism on that ground. One is not of higher merit than Cyprian simply because he may abhor that father's error, any more than they who did not fall into Peter's mistake are above him in worth on that account. Indeed Cyprian may have rectified his fault before death; and some say that those passages are interpolations. Augustin, however, concedes their authenticity. Cyprian, in his Epistle to Antonianus, shows how the African bishops maintained unity in spite of the corrupt lives of some colleagues; variations of opinion were allowed; neither were they contaminated by such a fellowship, nor was the Church destroyed. Tychonius states the result of a Donatist council which granted fellowship to those in their own body who had been guilty of tradition, and that without rebaptism, in case the restored should oppose such a repetition of the rite. Deuterius, bishop of Macriana, had admitted traditors to his communion without renewing the sacrament, and many witnesses of both facts were living in Tychonius's own day. Parmenian had indeed replied to the arguments, but could not gainsay the facts. Augustin professes in all sincerity his anxiety for the salvation of the jeopardized Donatists; the Church acknowledges the Sacrament which they have administered, and desires them to have the profit thereof. In defence of rebaptism Vincentius had alleged the case of Paul, repeating the ceremony after John. Augustin asks was John then a heretic? If not, it is for you to say why the ordinance was iterated; Christ's baptism is always the same and must not be iterated; it has nothing to do with the merit or demerit of the individual, or else Paul would not have declined its continuous administration. He begs him to put no confidence in the accident of their being a little company, and not to arrogate to themselves the title of Catholic, in the sense of being keepers of the entire law and all the sacraments, nor to peculiar sanctity as the few who were to have faith at the coming of the Son of Man. The Church does not take pleasure in correction, save for conversion; she abhors those who seek Donatist property out of sheer covetousness, yet all property does belong to the true Church. She has also no delight in any who disregard Donatist discipline, by receiving members who have been ejected from that body for sin. The Catholic Church sustains the unity, and recognizes the mixture of chaff and wheat, good and bad fish, the goats and the sheep. He bids him come to that Church into whose fellowship Vincentius had described Augustin as entering. He closes with reflections on the aggravations in the sin of schism and on the need of repentance.