"A little classic," this volume from the twentieth century Christian existentialist philosopher "reveals the astounding virtuosity of the man and the thinker" (Reinhold Niebuhr, New York Times Book Review). One of the greatest books ever written on the subject, Dynamics of Faith is a primer in the philosophy of religion. Paul Tillich, a leading theologian of the twentieth century, explores the idea of faith in all its dimensions, while defining the concept in the process. This graceful and accessible volume contains a new introduction by Marion Pauck, Tillich's biographer. "A good introduction for those who would like to get acquainted with [Tillich], an important clarification of his thought for those who have struggled through his earlier books and an important essay in its own right." —Albert C. Outler "Eagerly welcomed by all serious students of man and religion." —Publishers Weekly, starred review "The best introduction to Tillich . . . a lucid exposition of the doctrine of faith as 'ultimate concern.'" –New York Times