3 The causes of these evils are varied and manifold: no one, however, will gainsay the deplorable fact that the ministers of the Word do not apply thereto an adequate remedy. Has the Word of God then ceased to be what it was described by the Apostle, living and effectual and more piercing than any two-edged sword? Has long-continued use blunted the edge of that sword? If that weapon does not everywhere produce its effect, the blame certainly must be laid on those ministers of the Gospel who do not handle it as they should. For no one can maintain that the Apostles were living in better times than ours, that they found minds more readily disposed towards the Gospel or that they met with less opposition to the law of God.
Source: Humani Generis Redemptionem (Vatican.va)