St. Augustine writes to St. Jerome:
For I confess to your Charity that I have learned to yield this respect and honour only to the canonical books of Scripture: of these alone do I most firmly believe that the authors were completely free from error. And if in these writings I am perplexed by anything which appears to me opposed to truth, I do not hesitate to suppose that either the Ms. is faulty, or the translator has not caught the meaning of what was said, or I myself have failed to understand it. As to all other writings, in reading them, however great the superiority of the authors to myself in sanctity and learning, I do not accept their teaching as true on the mere ground of the opinion being held by them; but only because they have succeeded in convincing my judgment of its truth either by means of these canonical writings themselves, or by arguments addressed to my reason. I believe, my brother, that this is your own opinion as well as mine.