Whether any moral virtues are in us by infusion?

Objections

Objection 1 : It would seem that no virtues besides the theological virtues are infused in us by God. Because God does not do by Himself, save perhaps sometimes miraculously, those things that can be done by second causes; for, as Dionysius says (Coel. Hier. iv), "it is God's rule to bring about extremes through the mean." Now intellectual and moral virtues can be caused in us by our acts, as stated above (Article [2]). Therefore it is not reasonable that they should be caused in us by infusion.
Objection 2 : Further, much less superfluity is found in God's works than in the works of nature. Now the theological virtues suffice to direct us to supernatural good. Therefore there are no other supernatural virtues needing to be caused in us by God.
Objection 3 : Further, nature does not employ two means where one suffices: much less does God. But God sowed the seeds of virtue in our souls, according to a gloss on Heb. 1 [*Cf. Jerome on Gal. 1: 15,16]. Therefore it is unfitting for Him to cause in us other virtues by means of infusion.