Saint Vincent of Lerins
Information about the life of Saint Vincent is very scarce. Our primary source for him is the work of Gennadius of Massilia "On Famous Men" (Latin: De viris illustribus), composed about 495 as a continuation of the work of the same title by Saint Jerome of Stridon (June 15).
Vincent was born in the city of Toul, in the northeast of what is now France, and was the brother of Saint Lupus.of Troyes (July 29). After serving in the army (Latin: secularis militia), he entered the monastery of Saint Honoratus (January 16) at Lerins (Lérins), where he was tonsured and ordained to the priesthood.
In 434, under the pseudonym Peregrinus, Saint Vincent wrote his most famous work: "Commentary Against Heretics" (Latin: Commonitorium adversus Hæreticos) which he composed in 434, three years after the Third Ecumenical Council of Ephesus had condemned the Nestorians. In this book he differentiated between the Church's teachings and the heresies of his time. He is remembered for saying that Christians must follow the true Faith which has been held “everywhere, always, and by all.” He also defended the term “Theotokos” being applied to the Mother of God, in opposition to the teachings of Nestorius which were condemned at the Third Ecumenical Council.
He reposed during the reign of Emperors Theodosios II and Valentinian III, i.e. in the year 450 or earlier. Saint Vincent was much appreciated by his contemporaries. Saint Eucherius of Lyons (November 16) calls him a holy man, conspicuous for his eloquence and knowledge. On the other hand, Saint Vincent humbly describes himself as "the least of all the servants of God, and less than the least of all the Saints, and unworthy to bear the holy name of a Christian."
Saint Vincent fell asleep in the Lord about 445.. His holy relics are preserved at Lerins.