To Florus 1.105

For if justice imputes only what one is free to abstain from, and before baptism there is a necessity of evil, since the will, as you said, is not free to do good and consequently can do nothing but evil, then the very necessity it suffers defends it against the disgrace of evil. It cannot be burdened with its deeds before that justice which imputes no evil except what one is free to abstain from. After baptism, however, if there is a necessity of good, there certainly cannot be any sin. See, then, how impossible it is to find in seed what reason shows sin to be, when according to your definitions it can no longer be found even in conduct.