The Basilica of St. Mary in Alexandria will host the incorruptible heart of St. John Vianney, Curé of Ars and patron saint of priests, Jan. 15-16 as part of its national tour across the U.S.

But why send a heart across the U.S.? Matthew Tsakanikas, chair of the theology department at Christendom College in Front Royal, joins the show to explain why Catholics are fascinated by relics and the spiritual benefits.