Vincent was a monk and theologian on the island of Lérins in southern France. He set out the principle that true faith is what has been believed everywhere, always and by all, offering a standard for authentic tradition.
Life
Vincent of Lérins was a fifth-century monk in Gaul. After some years in worldly affairs, he entered the monastery on the island of Lérins, off the coast of today's southern France, and devoted himself to prayer and study.
Around 434 he wrote his Commonitorium, which offered a test for distinguishing the true Catholic faith from heresy. He taught that we must hold fast to "what has been believed everywhere, always, and by all," and he explained that understanding of the faith can grow while keeping its essence intact. He seems to have died before 450.
Spirituality
Vincent's spirituality is fidelity to tradition together with healthy growth. He saw the Church's faith as deepening the way a child grows into an adult, keeping its essence unchanged. Rather than chasing novelty, he urged being rooted in the faith the Church has held in common.
Reflection
Saint Vincent treasured what the Church has always believed together. When new ideas unsettle me, how do I stay rooted in the Church's long-held faith?