This book is a revised and expanded edition of three lectures delivered by the author at Wake Forest University in 1979. Long out of print, in its new edition it should be a valuable resource for scholars and teachers of thephilosophy of religion. The first two lectures, after a critique of the incompleteness of St. Thomas Aquinas's famous Five Ways of arguing for the existence of God, explore lesser-known resources of Aquinas's philosophical ascent...