Etz Chayim is the main work containing the interpretation of Isaac Luria's (the Ari) teachings collected by his foremost disciple, Chayim Vital. The latter dedicated good part of his life to the rearrangement and diffusion of his master's thought. The writing describes the Tree of Life in a very technical way and has significantly contributed to the birth of modern Kabbalah, in which the 10 Sefirot are replaced by the concept of the 5 Partzufim (configurations, faces)