Popes have always exalted the power of the Rosary

In his struggle against the Albigensian heretics, who attacked all the truths of faith and especially the divine maternity and virginity of Mary with horrible blasphemies, the Spaniard Saint Dominic, founder of the Dominican Order, while defending vigorously the sanctity of these dogmas, implored the help of the Virgin Mother by frequently addressing to her this invocation: "Suffer that I may praise you, O holy Virgin; give me strength against your enemies."

How pleasing to the Queen of Heaven was the conduct of her most devout servant is easy to guess from the fact that Mary taught the Church, her Son’s Spouse, the Most Holy Rosary. This prayer both vocal and mental—it is a meditation of the principal mysteries of our religion—is wonderfully adapted to nourishing devotion and inspiring souls to the practice of virtues.

Dominic was well inspired when he asked his disciples to preach often and zealously about this prayer, whose usefulness he knew well. He was, in fact, convinced of two things:

First, that Mary has so much influence with her divine Son that all the graces granted by God to men are always given to them through and at the wish of the Blessed Virgin;

Second, that Mary is so good and so merciful that, being used to spontaneously help those who suffer, she is incapable of sending away those who implore her help. Thus, the one whom the Church has acclaimed as Mother of Grace and Mother of Mercy has always shown herself to be such, especially when one has recourse to the Holy Rosary. This is why the Roman Pontiffs have never missed an opportunity to exalt the power of the Marian Rosary and to enrich it with the treasure of indulgences.

Sanctoral