7 We must now consider upon whom rests the obligation to dissipate this most pernicious ignorance and to impart in its stead the knowledge that is wholly indispensable. There can be no doubt, Venerable Brethren, that this most important duty rests upon all who are pastors of souls. On them, by command of Christ, rest the obligations of knowing and of feeding the flocks committed to their care; and to feed implies, first of all, to teach. "I will give you pastors according to my own heart," God promised through Jeremias, "and they shall feed you with knowledge and doctrine." Hence the Apostle Paul said: "Christ did not send me to baptize, but to preach the gospel," thereby indicating that the first duty of all those who are entrusted in any way with the government of the Church is to instruct the faithful in the things of God.
Source: Acerbo Nimis (Vatican.va)