Blessed Pope Pius IX (1846–78): Declared that Saint Louis De Montfort’s devotion to Mary was the best and most acceptable form of devotion to Our Lady.

Pope Leo XIII (1878–1903): Granted a Plenary Indulgence to those who make Saint Louis De Montfort’s act of consecration to the Blessed Virgin. On his deathbed he renewed the act himself and invoked the heavenly aid of Saint Louis De Montfort, whom he had beatified in 1888.

Pope Saint Pius X (1903–14): “I heartily recommend True Devotion to The Blessed Virgin, so admirably written by [Saint] De Montfort, and to all who read it grant the Apostolic Benediction.” . . .”There is no surer or easier way than Mary in uniting all men with Christ.”

Pope Benedict XV (1914–22): “A book of high authority and unction.”

Pope Pius XI (1922–39): “I have practiced this devotion ever since my youth.”

Pope Pius XII (1939–58): “God Alone was everything to him. Remain faithful to the precious heritage, which this great saint left you. It is a glorious inheritance, worthy, that you continue to sacrifice your strength and your life, as you have done until today.” Canonized St. Louis de Montfort on July 20th, 1947.

Pope Paul VI (1963–78): “We are convinced without any doubt that devotion to Our Lady is essentially joined with devotion to Christ, that it assures a firmness of conviction to faith in Him and in His Church, a vital adherence to Him and to His Church which, without devotion to Mary, would be impoverished and compromised.”

Pope St. John Paul II (1978–2005): “The reading of this book was a decisive turning-point in my life. I say ‘turning-point,’ but in fact it was a long inner journey . . . This ‘perfect devotion’ is indispensable to anyone who means to give himself without reserve to Christ and to the work of redemption.” . . .“It is from Montfort that I have taken my motto: ‘Totus tuus’ (‘I am all thine’). 

Vatican Council II (1962–1965): ‘The maternal duty of Mary toward men in no way obscures or diminishes this unique mediation of Christ, but rather shows its power. All her saving influence on men originates not from some inner necessity, but from the divine pleasure. It flows forth from the superabundance of the merits of Christ, rests on His mediation, depends entirely on it and draws all its power from it.’ . . . ‘The practices and exercises of devotion to her recommended by the Church in the course of the centuries [are to] be treasured.’ (Lumen Gentium: 60, 67).