is professor of theology. He previously taught philosophy at the University of San Francisco and theology at Sacred Heart Major Seminary and Ave Maria College, both in Michigan. Dr. Riordan wrote his dissertation on divinization in the writings of Dionysius the Areopagite. He has expanded it into a fuller study which has been published under the title Divine Light: The Theology of Denys the Areopagite. He is working on a new facing-page translation of the Mystical Theology by the same author (with introduction and commentary). His specialties include the areas of metaphysics, the doctrine of participation, and Trinitarian theology. He holds the degrees of B.A. from St. Mary’s University of California, M.A. from the Graduate Theological Union, Berkeley, and S.T.L. and S.T.D. from the Pontifical University of St. Thomas Aquinas in Rome.