This work is the most influential and widely studied foundation of modern Kabbalah. Presented here in a rigorous academic edition, it is accompanied by an exhaustive introduction that situates the text historically and explains its technical language and structure. Rather than presenting the Tree of Life as a fixed diagram, it reveals a living and evolving system that reflects human spiritual development. Central to its teaching is the shift from the classical ten Sefirot to the dynamic framework of the five Partzufim, a conceptual breakthrough that defined Lurianic and modern Kabbalistic thought. Challenging yet illuminating, this edition is intended for serious readers seeking to understand the inner architecture of existence.