The true devotion to Mary

Louis-Marie de Monfort, a 17th century saint is revered for his intense devotion to the Blessed Virgin Mary. St. Louis-Marie is perhaps most famously known for his prayer of entrustment to Our Lady, “Totus Tuus ego sum,” which means, “I am all yours.” Saint Pope John Paul II took the phrase “Totus Tuus” as his episcopal motto. His famous work hidden for 200 years was:  "True Devotion to the Blessed Virgin."
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“It is an easy way. It is the way which Jesus Christ Himself trod in coming to us, and in which there is no obstacle in reaching Him. It is true that we can attain divine union by other roads; but it is by many more crosses and strange deaths, and with many more difficulties, which we shall find it hard to overcome. We must pass through obscure nights, through combats, through strange agonies, over craggy mountains, through cruel thorns and over frightful deserts. But by the path of Mary we pass more gently and more tranquilly.”

― Louis de Montfort, 
​        True Devotion to Mary: With Preparation for Total Consecration.