18 And now, with words that rise from the depths of our fatherly heart, we turn to you, priests of Italy, and recommend to each and all of you to use every effort to correspond still more worthily with your high vocation. To you, ministers of Christ, we can say with more reason than did St. Paul to the mere faithful, "Obsecro itaque vos ego vinctus in Domino, ut digne ambuletis vocatione qua vocati estis."(17) The love of our common mother the Church renews and reinvigorates between you that concord of thought and action which redoubles the strength and renders the work more fruitful. In these times, so dangerous to religion and society, when the clergy of every nation are called on to unite together in defense of the Faith and Christian morals, it belongs to you, beloved sons, joined by a special bond to this Apostolic See, to give to all an example and be the first in unlimited obedience to the voice and command of the Vicar of Jesus Christ; and so may the blessing of God Which we invoke descend copiously and preserve the Italian clergy ever worthy of their illustrious traditions.
Source: Fin dal Principio (Vatican.va)