Since the power of granting indulgences was conferred by Christ on the Church (cf. Matt. 16:19, 18:18, John 20:23), and she has even in the earliest times made use of that power divinely given to her, the holy council teaches and commands that the use of indulgences, most salutary to the Christian people and approved by the authority of the holy councils, is to be retained in the Church, and it condemns with anathema those who assert that they are useless or deny that there is in the Church the power of granting them.
In granting them, however, it desires that in accordance with the ancient and approved custom in the Church moderation be observed, lest by too great facility ecclesiastical discipline be weakened. But desiring that the abuses which have become connected with them, and by any reason of which this excellent name of indulgences be blasphemed by the heretics, be amended and corrected, it ordains in a general way by the present decree that all evil traffic in them, which has been a most prolific source of abuses among the Christian people, be absolutely abolished. Other abuses, however, of this kind which have sprung from superstition, ignorance, irreverence, or from whatever other sources, since by reason of the manifold corruptions in places and provinces where they are committed, they cannot conveniently be prohibited individually, it commands all bishops diligently to make note of, each in his own church, and report them to the next provincial synod" (Sess. 25, Decree on Indulgences).