2 For these reasons, therefore, with the same causes in existence which impelled Us last year, as We have said, to rouse the piety of all, We have deemed it Our duty to exhort again this year the people of Christendom to persevere in that method and formula of prayer known as the Rosary of Mary, and thereby to merit the powerful patronage of the great Mother of God. In as much as the enemies of Christianity are so stubborn in their aims, its defenders must be equally staunch, especially as the heavenly help and the benefits which are bestowed on us by God are the more usually the fruits of our perseverance. It is good to recall to memory the example of that illustrious widow, Judith - a type of the Blessed Virgin - who curbed the ill-judged impatience of the Jews when they attempted to fix, according to their own judgment, the day appointed by God for the deliverance of His city. The example should also be borne in mind of the Apostles, who awaited the supreme gift promised unto them of the Paraclete, and persevered unanimously in prayer with Mary the Mother of Jesus. For it is indeed, an arduous and exceeding weighty matter that is now in hand: it is to humiliate an old and most subtle enemy in the spread-out array of his power; to win back the freedom of the Church and of her Head; to preserve and secure the fortifications within which should rest in peace the safety and weal of human society. Care must be taken, therefore, that, in these times of mourning for the Church, the most holy devotion of the Rosary of Mary be assiduously and piously observed, the more so that this method of prayer being so arranged as to recall in turn all the mysteries of our salvation, is eminently fitted to foster the spirit of piety.
Source: Superiore Anno (Vatican.va)