From his Inscrutabile, an exhortation to cowardly bishops to preach the Truth, esp. to those in error:
The affair is of the greatest importance since it concerns the Catholic faith, the purity of the Church, the teaching of the saints, the peace of the empire, and the safety of nations. Since it concerns the entire body of the Church, it is a special concern of yours because you are called to share in Our pastoral concern, and the purity of the faith is particularly entrusted to your watchfulness. “Now therefore, Brothers, since you are overseers among God’s people and their soul depends on you, raise their hearts to your utterance,” that they may stand fast in faith and achieve the rest which is prepared for believers only. Beseech, accuse, correct, rebuke and fear not: for ill-judged silence leaves in their error those who could be taught, and this is most harmful both to them and to you who should have dispelled the error. The holy Church is powerfully refreshed in the truth as it struggles zealously for the truth. In this divine work you should not fear either the force or favor of your enemies. The bishop should not fear since the anointing of the Holy Spirit has strengthened him: the shepherd should not be afraid since the prince of pastors has taught him by his own example to despise life itself for the safety of his flock: the cowardice and depression of the hireling should not dwell in a bishop’s heart. Our great predecessor Gregory, in instructing the heads of the churches, said with his usual excellence: “Often imprudent guides in their fear of losing human favor are afraid to speak the right freely. As the word of truth has it, they guard their flock not with a shepherd’s zeal but as hirelings do, since they flee when the wolf approaches by hiding themselves in silence…. A shepherd fearing to speak the right is simply a man retreating by keeping silent.” But if the wicked enemy of the human race, the better to frustrate your efforts, ever brings it about that a plague of epidemic proportions is hidden from the religious powers of the world, please do not be terrified but walk in God’s house in harmony, with prayer, and in truth, the three arms of our service. Remember that when the people of Juda were defiled, the best means of purification was the public reading to all, from the least to the greatest, of the book of the law lately found by the priest Helcias in the Lord’s temple; at once the whole people agreed to destroy the abominations and seal a covenant in the Lord’s presence to follow after the Lord and observe His precepts, testimonies and ceremonies with their whole heart and soul.” For the same reason Josaphat sent priests and Levites to bring the book of the law throughout the cities of Juda and to teach the people. The proclamation of the divine word has been entrusted to your faith by divine, not human, authority. So assemble your people and preach to them the gospel of Jesus Christ. From that divine source and heavenly teaching draw draughts of true philosophy for your flock. Persuade them that subjects ought to keep faith and show obedience to those who by God’s ordering lead and rule them. To those who are devoted to the ministry of the Church, give proofs of faith, continence, sobriety, knowledge, and liberality, that they may please Him to whom they have proved themselves and boast only of what is serious, moderate, and religious. But above all kindle in the minds of everyone that love for one another which Christ the Lord so often and so specifically praised. For this is the one sign of Christians and the bond of perfection.