From St. Louis de Montfort’s Secret of the Rosary:
Whatever you do, do not be like a certain pious but self-willed lady in Rome, so often referred to by speakers on the Rosary. She was so devout and fervent that she put to shame by her holy life even the strictest religious in the church.
Having decided to ask St. Dominic’s advice about her spiritual life, she made her confession to him. For penance he gave her one Rosary to say and advised her to say it every day. She excused herself, saying that she had her regular exercises, that she made the Stations of Rome every day, that she wore sackcloth as well as a hair-shirt, that she gave herself the discipline several times a week, that she often fasted and did other penances. Saint Dominic urged her over and over again to take his advice and say the Rosary, but she would not hear of it. She left the confessional, horrified at the methods of this new spiritual director who had tried so hard to persuade her to take up a devotion for which she had no taste.
Later on, when she was at prayer she fell into ecstasy and had a vision of her soul appearing before the Supreme Judge. Saint Michael put all her penances and to her prayers on one side of the scale and all her sins and imperfections on the other. The tray of her good works were greatly outweighed by that of her sins and imperfections.
Filled with alarm, she cried out for mercy, imploring the help of the Blessed Virgin, her gracious advocate, who took the one and only Rosary she had said for her penance and dropped it on the tray of her good works. This one Rosary was so heavy that it weighed more than all her sins as well as her good works. Our Lady then reproved her for having refused to follow the counsel of her servant Dominic and for not saying the Rosary every day.
As soon as she came to herself she rushed and threw herself at the feet of Saint Dominic and told him all that had happened, begged his forgiveness and promised to say the Rosary faithfully every day. By this means she rose to Christian perfection and finally to the glory of everlasting life.
You who are people of prayer, learn from this the power, the value and importance of this devotion of the holy Rosary when it is said with meditation on the mysteries.
Few saints have reached the same heights of prayer as Saint Mary Magdalen, who was lifted up to heaven by angels each day, and who had the privilege of learning at the feet of Jesus and his holy Mother. Yet one day, when she asked God to show her a sure way of advancing in his love and arriving at the heights of perfect, he sent the archangel St. Michael to tell her, on his behalf, that there was no other way to reach perfection than to meditate on our Lord’s passion. So he placed a cross in the front of her cave and told her to pray before it, contemplating the sorrowful mysteries which she had seen take place with her own eyes.
The example of Saint Francis de Sales, the great spiritual director of his time, should spur you on to join the holy confraternity of the Rosary, since, great saint though he was, he bound himself by vow to say the whole Rosary every day as long as he lived.
Saint Charles Borromeo also said it every day and strongly recommended this devotion to his priests and clerics in seminaries and to all his people.
Blessed Pius V, one of the greatest popes who have ever ruled the Church, used to say the Rosary every day. Saint Thomas of Villanova, Archbishop of Valencia, Saint Ignatius, Saint Francis Xavier, Saint Francis Borgia, Saint Teresa, and Saint Philip Neri, as well as many other great men whom I do not mention, were greatly devoted to the Rosary.
Follow their example; your spiritual directors will be very pleased, and if they are aware of the benefits which you can derive from this devotion, they will be the first to urge you to adopt it.