Glenn starts this episode with an overview of the medieval understanding of the liberal arts, then focuses in on music. Music was part of the quadrivium, the mathematical arts that described objective reality. Why is that? Why is music so significant for medieval thinkers? How does music relate to the human body or to the proper functioning of the universe? Glenn explores these questions, aided and abetted by Tom and Chris. We also get into more modern ideas about music, including its role in Christian thought and practice.