Here are some preaching points based on the life and theological contributions of St. Vincent of Lérins:

1. Faith as an Unchanging Truth – Vincent emphasized that true doctrine must be believed everywhere, always, and by all, highlighting the importance of continuity in Christian teaching.
2. Guarding Against False Teachings – His Commonitorium offered principles for distinguishing orthodox belief from heresy, reminding us to discern and uphold sound doctrine.
3. Development vs. Corruption of Doctrine – Vincent taught that authentic Christian growth develops but does not alter the original faith, reinforcing the importance of preserving biblical truth.
4. Defending the Divine Nature of Christ – He supported the Marian title "Theotokos", affirming Christ’s full divinity and humanity, which remains foundational to Christian faith.
5. The Role of Tradition in Faith – Vincent’s teachings stress that Scripture is illuminated through Church tradition, showing that faith is preserved through the wisdom of generations.