His parents took him to Father Dominic to be delivered from the evil spirits. He started to pray and he begged everyone who was there to say the Rosary out loud with him, and at each Hail Mary our Lady drove a hundred devils out of the man, and they came out in the form of red-hot coals.
After he had been delivered, he abjured his former errors, was converted and joined the Rosary Confraternity. Several of his associates did the same, having been greatly moved by his punishment and by the power of the Rosary.
The learned Franciscan, Carthagena, as well as several other authors, says that an extraordinary event took place in 1482. The venerable Fr. James Sprenger and the religious of his order were zealously working to re-establish devotion to the Rosary and its Confraternity in the city of Cologne. Unfortunately, two priests who were famous for their preaching ability were jealous of the great influence they were exerting through preaching the Rosary.
These two Fathers spoke against this devotion whenever they had a chance, and as they were very eloquent and had a great reputation, they persuaded many people not to join the Confraternity. One of them, the better to achieve his wicked end, wrote a special sermon against the Rosary and planned to give it the following Sunday. But when the time came for the sermon he did not appear and, after a certain amount of waiting, someone went to fetch him. He was found to be dead, and he had evidently died without anyone to help him.
After persuading himself that this death was due to natural causes, the other priest decided to carry out his friend's plan and give a similar sermon on another day, hoping to put an end to the Confraternity of the Rosary. However, when the day came for him to preach and it was time to give the sermon, God punished him by striking him down with paralysis which deprived him of the use of his limbs and of his power of speech.
At last he admitted his fault and that of his friend and in his heart he silently besought our Lady to help him. He promised that if only she would cure him, he would preach the Rosary with as much zeal as that with which he had formerly fought against it. For this end he implored her to restore his health and his speech, which she did, and finding himself instantaneously cured he rose up like another Saul, a persecutor turned defender of the holy Rosary. He publicly acknowledged his former error and ever afterwards preached the wonders of the Rosary with great zeal and eloquence.
Everyone knows that there are three different kinds of faith by which we believe different kinds of stories. To stories from Holy Scripture we owe divine faith; to stories on non-religious subjects which are not against common sense and are written by trustworthy authors, we pay the tribute of human faith; and to stories about holy subjects which are told by good authors and are not in any way contrary to reason, to faith or to morals (even though they may sometimes deal with happenings which are above the ordinary), we pay the tribute of a pious faith.
I agree that we must be neither too credulous nor too critical, and that we should keep a happy medium in all things in order to find just where truth and virtue lie. But on the other hand, I know equally well that charity easily leads us to believe all that is not contrary to faith or morals: "Charity believes all things" (1 Cor. 13:7), in the same way as pride induces us to doubt even well authenticated stories on the plea that they are not to be found in Holy Scripture.
This is one of the devil's traps; heretics of the past who denied tradition have fallen into it, and over-critical people of today are falling into it too, without even realizing it. People of this kind refuse to believe what they do not understand or what is not to their liking, simply because of their own spirit of pride and independence.
*Taken from The Secret of the Rosary, by St. Louis de Montfort; MONTFORT PUBLICATIONS, New York, 1954