"Dear Dominic, do you know which weapon the Blessed Trinity wants to use to reform the world?"
"Oh my Lady," answered Saint Dominic, "you know far better than I o because next to your Son Jesus Christ you have always been the chief instrument of our salvation."
Then our Lady replied:
"I want you to know that in this kind of warfare, the battering ram has always been the Angelic Psalter which is the foundation stone of the New Testament. Therefore if you want to reach these hardened souls and won them over to God, preach my psalter."
So he arose, comforted and burning with zeal for the conversion of the people in that district he made straight for the Cathedral. At once, unseen angels rang the bells to gather the people together and Saint Dominic began to preach...So fervently and compellingly did he explain the importance and value of the Holy Rosary that almost all the people of Toulouse embraced it and renounced their false beliefs. In a very short time, a great improvement was seen in the town people began leading Christian lives and gave up their former bad habits...
Inspired by the Holy Ghost, instructed by the Blessed Virgin as well as by his own experience, Saint Dominic preached the Holy Rosary for the rest of his life. He preached it by his example as well as by his sermons, in the cities and in country places, to people of high station and low, before scholars and the uneducated, to Catholics and to heretics