Rev. Dr. Jon Vieker, Dean of the Chapel and Associate Professor of Practical Theology at Concordia Seminary St. Louis, joins Andy and Sarah to talk about the O Antiphons, their place in our liturgical church history, what each Antiphon is, how they're connected to the hymn "O Come, O Come, Emmanuel" (Lutheran Service Book 357), and how we can use these in our devotional life during Advent. Read more about the O Antiphons at witness.lcms.org.