St. Louis was born in the Breton village of Montfort, close to Rennes, France, and in fact, came to identify himself by the adoption of his place of birth and baptism, in essence replacing his family name of Grignion.
After being educated by the Jesuits and the Sulpicians, he was ordained as a priest in 1700, and almost immediately he began preaching parish missions throughout western France. His years of ministering to the poor led him to travel and live in virtual poverty, sometimes even causing problems with his superiors, who did not understand the unique call God had given to St. Louis. Through his preaching, thousand of people who had lapsed in the Faith were called back to active life in the Church. In his preaching he recommended frequent, even daily, reception of Holy Communion, which was not the normal practice at that time. In all things he urged the Faithful to imitate the life of the Blessed Virgin Mary by practicing the daily acceptance of God’s divine Will in all things.
St. Louis founded the Missionaries of the Company of Mary for priests and brothers, and the Daughters of Wisdom, who cared especially for the sick. His book True Devotion to the Blessed Virgin has become a classic guide to Marian devotion.
St. Louis died in 1716 in Saint-Laurent-sur-Sèvre, where a basilica was erected in his honour and which contains his tomb. He was canonized in 1947.
O God, who didst will to direct the steps of thy Priest Saint Louis de Montfort along the way of salvation and of the love of Christ, in the company of the Blessed Virgin: grant us, by his example; that, meditating on the mysteries of thy love, we may strive tirelessly for the building up of thy Church; through Jesus Christ thy Son our Lord, who liveth and reigneth with thee, in the unity of the Holy Spirit, ever one God, world without end. Amen.