This lecture was given on May 28, 2022 at the 11th Annual Aquinas Philosophy Workshop on Aquinas on the Soul. The handouts for the lecture can be found here: https://tinyurl.com/42jmxp7u. For more information on upcoming events, please visit our website at www.thomisticinstitute.org. About the speaker: Thomas M. Osborne, Jr. (Ph.D., Duke 2001), is Professor of Philosophy and Chair of the Department of Philosophy, and a member of the Center for Thomistic Studies, University of St. Thomas (Houston). He has written many articles on medieval and late-scholastic philosophy and other topics, and is the author of Love of Self and Love of God in Thirteenth-Century Ethics (2005), Human Action in Thomas Aquinas, John Duns Scotus, and William of Ockham (2014), and Aquinas's Ethics (2020).