Accordingly, associating five priests with himself, in the year 1643, on the feastday of the Annunciation of the blessed Virgin Mary, he founded a Congregation of Priests, to whom he gave the most holy names of Jesus and Mary, and opened the first seminary at Caen; and a great many others followed immediately in Normandy and Brittany, also founded by him. For the recalling of sinful women to a Christian life, he founded the Order of Our Lady of Charity; of which most noble tree, the Congregation of the Good Shepherd of Angers is a branch. Furthermore, he founded the Society of the Admirable Heart of the Mother of God, and other charitable institutions. He was the author of many excellent treatises, and laboured as an Apostolic Missionary to the very end of his life, preaching the Gospel in very many villages, towns, and cities, and even in the royal court.
His matchless zeal was very conspicuous in promoting the salutary devotion towards the most sacred Hearts of Jesus and Mary, whose liturgical worship he was the first of all to devise, although not without some divine inspiration. He is therefore held to be the father, the teacher, and the apostle of that worship. Courageously withstanding the doctrines of the Jansenists, he preserved unalterable obedience towards the Chair of Peter, and he constantly prayed to God, both for his enemies as well as for his brethren. Broken by so many labours, rather than by years, desiring to be freed and to be with Christ, on the 19th day of August, 1680, frequently repeating the sweet names of Jesus and Mary, he died in peace. As he became illustrious by many miracles, Pope Pius X added him to the list of the Blessed, and as he still shone forth with new signs and wonders, Pope Pius XI, in the holy year and on the day of Pentecost, placed him among the Saints, and extended his Office and Mass to the universal Church.