Acknowledgments

The authors wish to extend grateful acknowledgment to the following publishers for permission to reprint excerpts from copyrighted material: Bobbs-Merrill Co., Inc. for Foundations of the Metaphysics of Morals by Immanuel Kant, translated by Lewis W. Beck; Holt, Rinehart and Winston, Inc. for Creative Evolution by Henri Bergson, translated by Arthur Mitchell; Macmillan London and Basingstoke for Mind-Energy by Henri Bergson, translated by H. Wildon Carr; National Geographic Society for the May 1963 National Geographic Magazine; Philosophical Research Society, Inc. for The Secret Teachings of All Ages by Manly R Hall; Random House, Inc. for Confessions of Saint Augustine , translated by Edward B. Pusey; Routledge & Kegan Paul Ltd. for The Song Celestial or Bhagavad-Gita, translated by Sir Edwin Arnold; and Simon & Schuster for The Story of Philosophy by Will Durant.