This book deals with central issues of medieval Jewish philosophy. Among the subjects treated are divine immanence, the intellect, miracles, and esoteric writing and its limits. The work provides a new perspective on the history of Jewish philosophy in the Middle Ages. Relying on many as yet unpublished manuscripts, which enable it to offer new insights relating to such thinkers as Judah Halevi, Maimonides, and Gersonides, it also presents a new and original perception of the dynamics of Jewish thought in general.