The late Aryeh Kaplan was one of the most creative personalities to bless the Jewish scene in the last generation. At his death he left many unpublished articles and other works. This collection contains some of his most provocative insights, combining ancient Kabbalistic teaching with the discoveries of modern science. Among the topics covered in this volume are such basic concepts as the Jewish and Kabbalistic view of immortality, resurrection of the dead, the age of the universe, and astrology. All are published for the first time. The book also includes a translation of Rabbi Israel Lipschitz' 1845 article on resurrection, which deals in part with the paleontological discoveries of the first half of the nineteenth century. It is thus one of the earliest such treatments by an Orthodox thinker, one which Rabbi Kaplan referred to and uses as a precedent for his own views.