Bishop of Milevis, in Numidia, in the fourth century. He was a convert, as we gather from Saint Augustine:Do we not see with how great a booty of gold and silver and garments Cyprian, doctor suavissimus, came forth out of Egypt, and likewise Lactantius, Victorinus, Optatus, Hilary?Optatus probably had been a pagan rhetorician. His work against the Donatists is an answer to Parmenian, the successor of Donatus in the See of Carthage. Saint Jerome tells us it was in six books and was written under Valens and Valentinian (364-375). We now possess seven books, and the list of popes is carried as far as Siricius (384-398). Similarly the Donatist succession of antipopes is given as Victor, Bonifatius, Encolpius, Macrobius, Lucianus, Claudianus (the date of the last is about 380), though a few sentences earlier Macrobius is mentioned as the actual bishop. The plan of the work is laid down in Book I, and is completed in six books. It seems, then, that the seventh book, which Saint Jerome did not know in 392, was an appendix to a new edition in which Saint Optatus made additions to the two episcopal lists. The date of the original work is fixed by the statement that sixty years and more had passed since the persecution of Diocletian (303-305). Photinus (died 376) is apparently regarded as still alive; Julian is dead (363). Thus the first books were published about 366-370, and the second edition about 385-390.
Saint Optatus deals with the entire controversy between Catholics and Donatists. He distinguishes between schismatics and heretics. The former have rejected unity, but the have true doctrine and true sacraments, hence Parmenian should not have threatened then (and consequently his own party) with eternal damnation. This mild doctrine is a great contrast to the severity of many of the Fathers against schism. It seems to be motived by the notion that all who have faith will be saved, though after long torments, a view which Saint Augustine has frequently to combat. Donatists and Catholics were agreed as to the necessary unity of the Church. The question was, where is this One Church? Optatus argues that it cannot be only in a corner of Africa; it must be the catholica (the word is used as a substantive) which is throughout the world. Parmenian had enumerated six dotes, or properties, of the Church, of which Optatus accepts five, and argues that the first, the episcopal chair, cathedra, belongs to the Catholics, and therefore they have all the others. The whole schism has arisen through the quarrel as to the episcopal succession at Carthage, and it might have been expected that Optatus would claim this property of cathedra by pointing out the legitimacy of the Catholic succession at Carthage. But he does not. He replies:We must examine who sat first in the chair, and where. You cannot deny that you know that in the city of Rome upon Peter first the chair of the bishop was conferred, in which sat the head of all the Apostles, Peter, whence also he was called Cephas, in which one chair unity should be preserved by all, lest the other Apostles should each stand up for his own chair, so that now he should be a schismatic and a sinner who should against this one chair set up another. Therefore in the one chair, which is the first of the dotes Peter first sat, to whom succeeded Linus.An incorrect list of popes follows, ending with,and to Damasus Siricius, who is to-day our colleague, with whom the whole world with us agrees by the communication of commendatory letters in the fellowship of one communion. Tell us the origin of your chair, you who wish to claim the holy Church for yourselves.Optatus then mocks at the recent succession of Donatist antipopes at Rome.
Optatus argues, especially in book V, against the doctrine which the Donatists had inherited from Saint Cyprian that baptism by those outside the Church cannot be valid, and he anticipates Saint Augustine's argument that the faith of the baptizer does not matter, since it is God who confers the grace. His statement of the objective efficacy of the sacraments ex opere operato is well known: "Sacramenta per se esse sancta, non per homines". Thus in baptism there must be the Holy Trinity, the believer and the minister, and there importance is in this order, the third being the least important. In rebuking the sacrileges of the Donatists, he says:What is so profane as to break, scrape, remove the altars of God, on which you yourselves had once offered, on which both the prayers of the people and the members of Christ have been borne, where God Almighty has been invoked, where the Holy Ghost has been asked for and has come down, from which by many has been received the pledge of eternal salvation and the safeguard of faith and the hope of resurrection? For what is an altar but the seat of the Body and Blood of Christ?In book VII a notable argument for unity is added: Saint Peter sinned most grievously and denied his Master, yet he retained the keys, and for the sake of unity and charity the Apostles did not separate from his fellowship. Thus Optatus defends the willingness of the Catholics to receive back the Donatists to unity without difficulty, for there must be always sinners in the Church, and the cockle is mixed with the wheat; but charity covers a multitude of sins.
The style of Saint Optatus is vigorous and animated. He aims as terseness and effect, rather than at flowing periods, and this in spite of the gentleness and charity which is so admirable in his polemics against his "brethren", as he insists on calling the Donatist bishops. He uses Cyprian a great deal, though he refutes that saint's mistaken opinion about baptism, and does not copy his easy style. His descriptions of events are admirable and vivid. It is strange that Dupin should have called him minus nitidus ac politus, for both in the words he employs and in their order he almost incurs the blame of preciosity. His is as strict as Cyprian as to the metrical cadences at the close of every sentence. He was evidently a man of good taste as well as of high culture, and he has left us in his one work a monument of convincing dialectic, of elegant literary form, and of Christian charity. But the general marshalling of his arguments is not so good as is the development of each by itself. His allegorical interpretations are far-fetched, but those of Parmenian were evidently yet more extravagant. An appendix contained an important dossier of documents which had apparently been collected by some Catholic controversialist between 330 and 347. This collection was already mutilated when it was copied by the scribe of the only manuscript which has preserved it, and that manuscript is incomplete, so that we can have to deplore the loss of a great part this first-rate material for the early history of Donatism. We can tell what has been lost by the citations made by Optatus himself and by Augustine.
Saint Optatus has apparently never received any ecclesiastical cultus; but his name was inserted in the Roman Martyrology on the fourth of June, though it is quite unknown to all the ancient Martyrologies and calendars.Catholic Encyclopedia