This book reveals Albert Einstein's lifelong search for spiritual fulfillment - a fulfillment he sought in science and Jewish tradition - and adds to the growing literature concerning physicists and their relationships to religion and God. Robert N. Goldman has studied the vast library of Einstein's personal letters and other archival materials to uncover the legendary thinker's pursuit of spiritual understanding. Important philosophical influences are examined, and their integration with Einstein's theories regarding time and space are imparted by selections from his own writings. The author's thoughtful investigation of the sources further illuminates Einstein's thought processes and theology.