The Council of Trent decreed that the essence of active justification comprises not only forgiveness of sin, but also “sanctification and renovation of the interior man by means of the voluntary acceptation of sanctifying grace and other supernatural gifts” (Trent, l. c., cap. vii: “Non est sola peccatorum remissio, sed et sanctificatio et renovatio interioris hominis per voluntariam susceptionem gratiae et donorum”). In order to exclude the Protestant idea of a merely forensic absolution and exterior declaration of righteousness, special stress is laid on the fact that we are justified by God’s justice, not that whereby He himself is just but that whereby He makes us just, in so far as He bestows on us the gift of His grace which renovates the soul interiorly and adheres to it as the soul’s own holiness (Trent, l. c., cap. vii: “Unica formalis causa [justificationis] est justitia Dei, non qua ipse justus est, sed qua nos justos facit, qua videlicet ab eo donati, renovamur spiritu mentis nostrae: et non modo reputamur, sed vere justi nominamur et sumus, justitiam in nobis recipientes unusquisque suam”). This inner quality of righteousness and sanctity is universally termed “sanctifying (or habitual) grace”, and stands in marked contrast to an exterior, imputed sanctity, as well as to the idea of merely covering and concealing sin. By this, however, we do not assert that the “justitia Dei extra nos” is of no importance in the process of justification. For, even if it is not the formal cause of justification (causa formalis), it is nevertheless its true exemplar (causa exemplaris), inasmuch as the soul receives a sanctity in imitation of God’s own holiness. The Council of Trent (l. c. cap. vii), moreover, did not neglect to enumerate in detail the other causes of justification: the glory of God and of Christ as the final cause (causa finalis), the mercy of God as the efficient cause (causa efficiens), the Passion of Christ as the meritorious cause (causa meritoria), the reception of the Sacraments as the instrumental cause (causa instrumentalis). Thus each and every factor receives its full share and is assigned its proper place.