Donald Wallenfang, Emmanuel Mary of the Cross, is a Secular Discalced Carmelite and professor of theology and philosophy at Sacred Heart Major Seminary in Detroit. He is the author of Metaphysics: A Basic Introduction in a Christian Key (Cascade, 2019); Phenomenology: A Basic Introduction in the Light of Jesus Christ (Cacade, 2019); Dialectical Anatomy of the Eucharist: An Étude in Phenomenology (Cascade, 2017); Human and Divine Being: A Study on the Theological Anthropology of Edith Stein (Cascade, 2017); and coeditor (with John C. Cavadini) of Evangelization as Interreligious Dialogue (Pickwick, 2019) and Pope Francis and the Event of Encounter (Pickwick, 2018).