The following story shows the great power of the Rosary Saint Louis Grignion de Montfort planed to visit the island of Yeu, 17 kilometers from the coast of France, to preach a mission. It was at the time of the War of Spanish Succession. English pirates patrolled the sea and the coast making it dangerous. Because of this insecurity, the missionary's companions urged him to forgo the trip. But in vain! He could not rest until he had convinced some brave sailors to take him in their ship ... The boat finally left the shore. Everything went smoothly at first, but after three hours of on the sea, two pirate ships loomed over the horizon, heading at full speed towards the missionaries and their ship. The crew began to scream with fright. The desperate sailors shouted: "We're goners!" Montfort's companions started to sob. As for the saint, he kept his good spirits and began to sing hymns. He called on the other passengers to follow suit. But they remained silent as fish in the sea. So Montfort said: "Since you do not care to sing, recite the rosary with me."