2 This is the reason why We have considered it necessary to turn to the Christian people and urge them to implore, with increased zeal and constancy, the aid of Almighty God. At this proximity of the month of October, which We have already consecrated to the Virgin Mary, under the title of Our Lady of the Rosary, We earnestly exhort the faithful to perform the exercises of this month with, if possible, even more piety and constancy than heretofore. We know that there is sure help in the maternal goodness of the Virgin, and We are very certain that We shall never vainly place Our trust in her. If, on innumerable occasions, she has displayed her power in aid of the Christian world, why should We doubt that she will now renew the assistance of her power and favour, if humble and constant prayers are offered up on all sides to her? Nay, We rather believe that her intervention will be the more marvellous as she has permitted Us to pray to her, for so long a time, with special appeals. But We entertain another object, which, according to your wont, Venerable Brethren, you will advance with fervour. That God may be more favourable to Our prayers, and that He may come with bounty and promptitude to the aid of His Church, We judge it of deep utility for the Christian people, continually to invoke with great piety and trust, together with the Virgin-Mother of God, her chaste Spouse, the Blessed Joseph; and We regard it as most certain that this will be most pleasing to the Virgin herself. On the subject of this devotion, of which We speak publicly for the first time to-day, We know without doubt that not only is the people inclined to it, but that it is already established, and is advancing to full growth. We have seen the devotion to St. Joseph, which in past times the Roman Pontiffs have developed and gradually increased, grow into greater proportions in Our time, particularly after Pius IX., of happy memory, Our predecessor, proclaimed, yielding to the request of a large number of bishops, this holy patriarch the patron of the Catholic Church. And as, moreover, it is of high importance that the devotion to St. Joseph should engraft itself upon the daily pious practices of Catholics, We desire that the Christian people should be urged to it above all by Our words and authority.
Source: Quamquam Pluries (Vatican.va)