[76.] This being the case, it is now time that we should recapitulate, at the close of this second Commonitory, what was said in that and in the preceding.
We said above, that it has always been the custom of Catholics, and still is, to prove the true faith in these two ways; first by the authority of the Divine Canon, and next by the tradition of the Catholic Church. Not that the Canon alone does not of itself suffice for every question, but seeing that the more part, interpreting the divine words according to their own persuasion, take up various erroneous opinions, it is therefore necessary that the interpretation of divine Scripture should be ruled according to the one standard of the Church's belief, especially in those articles on which the foundations of all Catholic doctrine rest.
[77.] We said likewise, that in the Church itself regard must be had to the consentient voice of universality equally with that of antiquity, lest we either be torn from the integrity of unity and carried away to schism, or be precipitated from the religion of antiquity into heretical novelties. We said, further, that in this same ecclesiastical antiquity two points are very carefully and earnestly to be held in view by those who would keep clear of heresy: first, they should ascertain whether any decision has been given in ancient times as to the matter in question by the whole priesthood of the Catholic Church, with the authority of a General Council: and, secondly, if some new question should arise on which no such decision has been given, they should then have recourse to the opinions of the holy Fathers, of those at least, who, each in his own time and place, remaining in the unity of communion and of the faith, were accepted as approved masters; and whatsoever these may be found to have held, with one mind and with one consent, this ought to be accounted the true and Catholic doctrine of the Church, without any doubt or scruple.
[78.] Which lest we should seem to allege presumptuously on our own warrant rather than on the authority of the Church, we appealed to the example of the holy council which some three years ago was held at Ephesus in Asia, in the consulship of Bassus and Antiochus, where, when question was raised as to the authoritative determining of rules of faith, lest, perchance, any profane novelty should creep in, as did the perversion of the truth at Ariminum, the whole body of priests there assembled, nearly two hundred in number, approved of this as the most Catholic, the most trustworthy, and the best course, viz., to bring forth into the midst the sentiments of the holy Fathers, some of whom it was well known had been martyrs, some Confessors, but all had been, and continued to the end to be, Catholic priests, in order that by their consentient determination the reverence due to ancient truth might be duly and solemnly confirmed, and the blasphemy of profane novelty condemned. Which having been done, that impious Nestorius was lawfully and deservedly adjudged to be opposed to Catholic antiquity, and contrariwise blessed Cyril to be in agreement with it. And that nothing might be wanting to the credibility of the matter, we recorded the names and the number (though we had forgotten the order) of the Fathers, according to whose consentient and unanimous judgment, both the sacred preliminaries of judicial procedure were expounded, and the rule of divine truth established. Whom, that we may strengthen our memory, it will be no superfluous labour to mention again here also.