Fr. Cassian Derbes explores how wonderment, contemplation, and friendship with God are essential to the Christian life, drawing on insights from Aristotle, Saint Thomas Aquinas, and literary works such as A River Runs Through It.This lecture was given on January 18th, 2025, at Cedarbrake Catholic Retreat Center.For more information on upcoming events, visit us at thomisticinstitute.org/upcoming-events.About the Speaker:Fr. Cassian Derbes, O.P. is a priest of the Dominican Province of Saint Joseph. He is currently a visiting professor at the University of Notre Dame in the Mendoza College of Business. Father Cassian served recently as vice dean and professor of theology at the Pontifical University of Saint Thomas Aquinas (Angelicum) in Rome. His previous teaching positions include as adjunct professor of theology at the Pontifical College Josephinum in Ohio. Father Cassian earned his Doctorate in Sacred Theology (S.T.D.) from the Angelicum. He has a Licentiate in Sacred Theology (S.T.L.) from the Dominican House of Studies in Washington, DC, a Bachelor’s degree (B.A.) from New York University (N.Y.U.), and he is a graduate of Jesuit High School in New Orleans, Louisiana. From 2014-2020, Father Cassian served as director of an initiative at the Vatican under Pope Francis to design, implement, and teach an executive leadership development program for the Cardinals, Bishops, and senior lay officials of the Roman Curia. Father Cassian is a Missionary of Mercy, having been appointed by Pope Francis in 2015.This project/publication was made possible through the support of Grant 63391 from the John Templeton Foundation. The opinions expressed in this publication are those of the author(s) and do not necessarily reflect the views of the John Templeton Foundation.Keywords: Aristotelianism, Charity, Christian Contemplation, Ethics, Friendship With God, Interior Life, A River Runs Through It, Reginald Garrigou-Lagrange, Speculative Intellect, Virtue Ethics