This book represents the first wide-scale presentation of a major Jewish mystic, the founder of the ecstatic Kabbalah. It includes a description of the techniques employed by his master, including the role of music. There is a discussion of the characteristics of his mystical experience and the erotic imagery by which it was expressed. Based on all the extant manuscript material of Abulafia, this book opens the way to a new understanding of Jewish mysticism. It points to the importance of the ecstatic Kabbalah for the later developments in mystical Judaism.