David W. Fagerberg is Professor Emeritus of Theology at the University of Notre Dame. He holds an M.Div. from Luther Northwestern Seminary; an M.A. from St. John's University, Collegeville; an S.T.M. from Yale Divinity School; and a Ph.D. from Yale University. His work first explored how lex orandi is the foundation for lex credendi (Theologia Prima, 2003). To this he integrated the Orthodox understanding of asceticism as capacitating the liturgical person (On Liturgical Asceticism, 2013). He applied this to our liturgical life in the world (Consecrating the World, 2016) and then to our interior liturgical life (Liturgical Mysticism, 2019).