53 The erroneous and false doctrines and maxims that We have just pointed out and deplored have cropped up many times during these last few years, and it is well known that We have never, with God's help, done any less than Our apostolic duty in exposing them and in confronting them with the just claims of true Catholic doctrine, and with the inviolable rights of the Church of Jesus Christ and of the souls redeemed by His precious Blood.
Source: Non Abbiamo Bisogno (Vatican.va)