quote=OrthodoxyUSA;
Ancient History Sourcebook:
St. Vincent of Lerins:
The "Vincentian Canon", AD 434
From Chapter 4 of the Commonitorium
A.D. 434
[ed. Moxon, Cambridge Patristic Texts] *
(1) I have continually given the greatest pains and diligence to inquiring, from the greatest possible number of men outstanding in holiness and in doctrine, how I can secure a kind of fixed and, as it were, general and guiding principle for distinguishing the true Catholic Faith from the degraded falsehoods of heresy. And the answer that I receive is always to this effect; that if I wish, or indeed if anyone wishes, to detect the deceits of heretics that arise and to avoid their snares and to keep healthy and sound in a healthy faith, we ought, with the Lord's help, to fortify our faith in a twofold manner, firstly, that is, by the authority of God's Law, then by the tradition of the Catholic Church.
(2) Here, it may be, someone will ask, Since the canon of Scripture is complete, and is in itself abundantly sufficient, what need is there to join to it the interpretation of the Church? The answer is that because of the very depth of Scripture all men do not place one identical interpretation upon it. The statements of the same writer are explained by different men in different ways, so much so that it seems almost possible to extract from it as many opinions as there are men. Novatian expounds in one way, Sabellius in another, Donatus in another, Arius, Eunomius and Macedonius in another, Photinus, Apollinaris and Priscillian in another, Jovinian, Pelagius and Caelestius in another, and latterly Nestorius in another. Therefore, because of the intricacies of error, which is so multiform, there is great need for the laying down of a rule for the exposition of Prophets and Apostles in accordance with the standard of the interpretation of the Church Catholic.