This new book is an introduction to the Tradition, enriched by many illustrations and diagrams. It outlines its origins in Biblical, mythological and metaphysical terms that explain why Existence came into being, according to Jewish mysticism. Kabbalistic cosmology and psychology are cast in ancient, medieval and modern forms in order to reveal the processes of evolution and its aim 'to aid God to behold God'. This books is a synthesis of Halevi's works. Z'ev ben Shimon Halevi is the Hebrew name of Warren Kenton, who was bom in 1933 into a Sefardi Jewish Levite family in England.