On Driving Home the Faith, Dr. Ken Craycraft continues his conversation with Mike Aquilina about the life and thought of St. Augustine, focusing on Augustine's influence on Pope Leo XIV and the pope's Augustinian spirituality.

Mike explains the meaning behind Pope Leo XIV's papal motto, “In illo uno unum” — “In the one we are one,” which comes from St. Augustine's writings on the Psalms. The conversation explores Augustine's profound understanding of the totus Christus, or “whole Christ”—the mystery that Christ and His Church are united as one body.

Ken and Mike also discuss Augustine's deep love of the Psalms, their importance in his conversion and spiritual life, and why the Psalms remained central to his preaching and theology. They examine Augustine's interpretation of Psalm 128 and his Eucharistic understanding of the Church as Christ's Body, emphasizing the profound connection between receiving Christ in the Eucharist and becoming more deeply united to His Body, the Church.

The conversation concludes with a look at Augustine's extraordinary gifts as a preacher and rhetorician, including his homilies on the Gospel and Epistles of St. John and his sermons on the saints, which reveal the depth of his Catholic faith and spirituality.