To Florus 3.206
Let us see, then, how the second part of your statement returns to this point too. You said: ‘Whoever says human nature is not good denies a good Creator to the nature created; whoever denies it contains evil begrudges a merciful Savior to the nature corrupted’ (Augustine, Marriage and Sexual Desire 2.36). As you have been forced to profess, anyone denying that it is good also denies its good Creator, that is, God. And for nature to be evil means nothing other than to possess evil desert naturally. Thus even your confession supports our truth: you deny the good God as creator of humans, whose nature you swear is evil, appealing both to its vices and to its punishments.