To Florus 4.10
For I say: “What, then, does the devil recognize as his own in the sexes, so that, as you say, he rightly possesses their offspring? Their difference? But that exists in the bodies God made. Their union? But it is defended by the privilege of God’s blessing no less than by his institution. Or perhaps fertility itself? But that is the very reason marriage was instituted.” What was new here? What disagreed with the previous conclusion you had approved, so that you thought you should blame it after praising it? Certainly nothing. What follows, then, from such disgusting inconsistency? Clearly, since my argument has not changed while your assessment of my words has altered, your intention is utterly foul and your reasoning weak.