Although the church forbore to prohibit absolutely the repetition of matrimony among the laity, it yet, at an early though uncertain period, imitated the rule enforced on the Flamen Dialis, and rendered it obligatory on the priesthood, thus for the first time drawing a distinct line of separation between the great body of the faithful and those who officiated as ministers of Christ. It thus became firmly and irrevocably established that no “digamus” or husband of a second wife was admissible to holy orders. As early as the time of Tertullian we find the rule formally expressed by him, and he even assures us that the whole structure of the church was based upon the single marriages of its ministers. Indeed, the holy rites came to be regarded as so entirely incompatible with repetition of wedlock that the Council of Elvira, in 305, while admitting that in cases of extreme necessity a layman might administer baptism, is careful to specify that he must not be a “digamus.”[44] Yet this restriction on the priesthood was not easily enforced, and already we begin to hear the complaints, which have followed uninterruptedly for more than fifteen hundred years, of the evasion or disregard of the regulations whereby the church has sought to repress the irrepressible instincts of humanity. In the early part of the third century Hippolytus, Bishop of Portus, in his enumeration of the evil ways of Pope Calixtus, taxes the pontiff with admitting to the priesthood men who had been married twice, and even thrice, and with permitting priests to marry while in orders. Even the great apostle of celibacy, St. Jerome, expresses surprise that Oceanus should object to Carterius, a Spanish bishop, on the ground that he had had a wife before baptism, and a second one after admission to the church. The world, he adds, is full of such prelates, not only in the lower orders but in the episcopate, the digamous members of which exceed in number the three hundred prelates lately assembled at the Council of Rimini. Yet this was the formal rule of the church as enunciated in the Apostolic Constitutions and Canons—bodies of ecclesiastical law not included, indeed, in the canon of Scripture, but yet so venerable that their origin was already lost sight of, and they were everywhere received as authoritative expositions of primitive discipline.[45]