This comprehensive study of the affinity of thought between Friedrich Nietzsche and C. G. Jung reveals that the quest for wholeness, the central theme in Jung's psychology, is the dominant thread that runs through the entire fabric of Nietzsche's writings. Emerging in his earliest essays and ultimately interweaving the major philosophical concepts of his latest works, this underlying theme provides the pull-thread for unraveling the intricately entwined skein of Nietzsche's complex but coherent philosophy. This book aims, on the one hand, to expose the extraordinary reflection of Nietzsche's ideas in Jung's writings, and, at the same time, to employ the language of analytical psychology to illustrate and clarify Nietzsche's message.