Through a lifetime of passionate scholarship, Gershom Scholem (1897-1982) uncovered the "domains of tradition hidden under the debris of centuries" and made the history of Jewish mysticism and messianism comprehensible and relevant to current Jewish thought. In this paperback edition of his definitive book on Scholem's work, David Biale has shortened and rearranged his study for the benefit of the general reader and the student. A new introduction and new passages in the main text highlight the pluralistic character of Jewish theology as seen by Scholem, the place of the Kabbalah in debates over Zionism versus assimilation, and the interpretation of Kafka as a Jewish writer.