Douglas H. Shantz is Professor of Christian Thought at the University of Calgary. His recent books are Between Sardis and Philadelphia (2008), and A New Introduction to German Pietism (2012). Tinu Ruparell is Associate Professor of Religious Studies at the University of Calgary. He is coeditor, with Ian S. Markham, of Encountering Religion (2000). His current work centers on idealism in Ramanuja and Leibniz as well as on science and religion.