26 We must spare no pains, Venerable Brethren, in seeing that the flock does not feed on this air of foolish empty-headed men. Rather, it should be nourished with the life-giving food of "the ministers of the word." These can truly say, "On behalf of Christ...we are acting as ambassadors, God, as it were, appealing through us...be reconciled to God...we avoid unscrupulous conduct, we do not corrupt the word of God; but making known the truth, we commend ourselves to every man's conscience in the sight of God..." We are workmen "that cannot be ashamed, rightly handling the word of truth." Those very holy and fruitful rules the Bishop of Milan frequently laid down for his people have a similar value for us. They can best be summarized in these words of Saint Paul: "When you heard and received from us the word of God, you welcomed it not as the word of man, but, as it truly is, the word of God, who works in you who have believed."
Source: Editae Saepe (Vatican.va)