2. For the Deletion of Sin an Act as it is First Generative of Virtue can Suffice

129. I prove the second [n.127], that an act equally perfect as to all moral circumstances is equally accepted by God for deletion of sin; but it is possible for an act equally perfect as to all circumstances to be had without generated virtue, just as it is possible for it to be had now with generated virtue. For there can be, in accord with a perfect dictate of intellect about any doable thing, a perfect choice, conditioned by all the circumstances, that is first generative of the virtue; and consequently, a right act perfectly circumstanced (which is required for deletion of sin), does not have to be an act of virtue as coming from a virtue now inwardly present, but it can come from an act of virtue as this act is first generative of the virtue.