True Devotion to Mary is the most influential spiritual work of Saint Louis-Marie de Montfort (1673–1716), a French missionary, mystic, and priest. Widely regarded as a cornerstone of Marian spirituality within the Catholic tradition, the book presents a profound and structured theology of total consecration to the Blessed Virgin Mary—not as an end in itself, but as the most secure, direct, and perfect path to union with Jesus Christ.
In this work, Montfort proposes a radical form of "totus tuus" devotion—a total surrender of oneself, one's actions, and spiritual merits to Mary, so that she may lead the soul more perfectly to Christ. He emphasizes that devotion to Mary is not about equating her with God, but about recognizing her unique role in salvation history as the chosen Mother of God and mediatrix of grace. Montfort's teachings are deeply rooted in Scripture, the Church Fathers, and Catholic tradition. His influence is evidenced by the fact that Pope John Paul II adopted "Totus Tuus" as his personal motto, directly inspired by this book. True Devotion to Mary is not only a theological treatise but also a powerful spiritual guide, calling believers to humility, inner conversion, and a Christ-centered life through Mary. It challenges the reader intellectually and spiritually, offering a path to holiness that engages the heart, will, and daily practice.
This book remains essential for anyone seeking to deepen their understanding of Catholic spirituality and Marian theology. Its enduring impact on saints, popes, and the faithful underscores its significance. True Devotion to Mary presents a compelling vision of how the Christian life, lived in intimate union with Mary, becomes a complete and transformative surrender to Jesus Christ.