O predestinate souls, slaves of Jesus in Mary, learn that the Hail Mary is the most beautiful of all prayers after the Our Father. It is the most perfect compliment which you can give to Mary, because it is the compliment which the Most High sent her by an archangel in order to win her heart; and it was so powerful over her heart by the secret charms of which it is so full, that in spite of her profound humility she gave her consent to the Incarnation of the Word. It is by this compliment also that you will infallibly win her heart, if you say it as you ought.
The Hail Mary well said, that is with attention, devotion, and modesty is, according to the saints, the enemy of the devil which puts him to flight, and the hammer which crushes him. It is the sanctification of the soul, the joy of the angels, the melody of the predestinate, the canticle of the New Testament, the pleasure of Mary, and the glory of the most Holy Trinity. The Hail Mary is a heavenly dew which fertilizes the soul. It is the chaste and loving kiss which we give to Mary. It is a vermilion rose which we present to her; a precious pearl we offer her; a chalice of divine ambrosial nectar which we proffer to her. All these are comparisons of the saints.
I pray you urgently, by the love I bear you in Jesus and Mary, not to content yourselves with saying the Little Crown of the Blessed Virgin, but to say five decades, or even, if you have time, fifteen decades of the Rosary every day. At the moment of your death you will bless the day and the hour in which you followed my advice. Having thus sown in the blessings of Jesus and Mary, you will reap eternal blessings in Heaven. “He who soweth in blessings, shall also reap blessings.” (2 Cor. 9:6).
St. Louis Marie de Montfort