Proverbs 10:12

But as we say that a man can be a believer without learning, so also we assert that it is impossible for a man without learning to comprehend the things which are declared in the faith. But to adopt what is well said, and not to adopt the reverse, is caused not simply by faith, but by faith combined with knowledge. But if ignorance is want of training and of instruction, then teaching produces knowledge of divine and human things. But just as it is possible to live rightly in penury of this world’s good things, so also in abundance. And we avow, that at once with more ease and more speed will one attain to virtue through previous training. But it is not such as to be unattainable without it; but it is attainable only when they have learned, and have had their senses exercised. …

For as our enemy separates brethren who are still weak and carnal by a sudden burst of rage on account of some trifling and earthly matter, so he sows the seeds of discord even between spiritual persons, on the ground of some difference of thoughts, from which certainly those contentions and strifes about words, which the Apostle condemns, for the most part arise: whereby consequently our spiteful and malignant enemy sows discord between brethren who were of one mind. For these words of wise Solomon are true: “Contention breeds hatred: but friendship will be a defence to all who do not strive.”