On Christian Doctrine 101Wicked Men Judge Others by Themselves.

28. But those who, giving the rein to lust, either wander about steeping themselves in a multitude of debaucheries, or even in regard to one wife not only exceed the measure necessary for the procreation of children, but with the shameless licence of a sort of slavish freedom heap up the filth of a still more beastly excess, such men do not believe it possible that the men of ancient times used a number of wives with temperance, looking to nothing but the duty, necessary in the circumstances of the time, of propagating the race; and what they themselves, who are entangled in the meshes of lust, do not accomplish in the case of a single wife, they think utterly impossible in the case of a number of wives.

29. But these same men might say that it is not right even to honor and praise good and holy men, because they themselves when they are honored and praised, swell with pride, becoming the more eager for the emptiest sort of distinction the more frequently and the more widely they are blown about on the tongue of flattery, and so become so light that a breath of rumor, whether it appear prosperous or adverse, will carry them into the whirlpool of vice or dash them on the rocks of crime. Let them, then, learn how trying and difficult it is for themselves to escape either being caught by the bait of praise, or pierced by the stings of insult; but let them not measure others by their own standard.