3 Pray, my dear father, warn this man not to hold language contrary to his profession, and not to undo with his words the chastity which he professes by his garb. Whether he elects to be a virgin or a married celibate— and the choice must rest with himself— he must not compare wives with virgins, for that would be to have striven in vain against Jovinian's eloquence. He likes, I am told, to visit the cells of widows and virgins, and to lecture them with his brows knit on sacred literature.
What is it that he teaches these poor women in the privacy of their own chambers? Is it to feel assured that virgins are no better than wives? Is it to make the most of the flower of their age, to eat and drink, to frequent the baths, to live in luxury, and not to disdain the use of perfumes? Or does he preach to them chastity, fasting, and neglect of their persons? No doubt the precepts that he inculcates are full of virtue. But if so, let him admit publicly what he says privately.
Or, if his private teaching is the same as his public, he should keep aloof altogether from the society of girls. He is a young man— a monk, and in his own eyes an eloquent one (do not pearls fall from his lips, and are not his elegant phrases sprinkled with comic salt and humor?)— I am surprised, therefore, that he can without a blush frequent noblemen's houses, pay constant visits to married ladies, make our religion a subject of contention, distort the faith of Christ by misapplying words, and— in addition to all this— detract from one who is his brother in the Lord.
He may, however, have supposed me to be in error (for “in many things we offend all,” and “if any man offend not in word he is a perfect man”). In that case he should have written to convict me or to question me, the course taken by Pammachius, a man of high attainments and position. To this latter I defended myself as best I could, and in a lengthy letter explained the exact sense of my words. He might at least have copied the diffidence which led you to extract and arrange such passages as seemed to give offense; asking me for corrections or explanations, and not supposing me so mad that in one and the same book I should write for marriage and against it.
Source: Letters (New Advent)