Douglas Groothuis (PhD, University of Oregon) is professor of philosophy at Denver Seminary. He is the author of numerous books, including Philosophy in Seven Sentences, Unmasking the New Age, Truth Decay, On Pascal, On Jesus, and Walking Through Twilight: A Wife's Illness-A Philosopher's Lament. He has written for scholarly journals such as Religious Studies, Sophia, Research in Philosophy and Technology, Journal of the Evangelical Theological Society, and Philosophia Christi, as well as for numerous popular magazines.