The sixth volume of Talmud Esser Sefirot, the monumental work authored by Rabbi Yehudah Leib Ashlag, Ba'al Hasulam, explains the writings of the holy Ari’zal vividly and wonderfully with additional commentary by the Baal Hasulam’s son, Rabbi Baruch Halevi Ashlag – the Birkat Shalom.   This volume includes the first half of section seven which describes the concepts of gadlut olam hanekudim and shvirat hakelim.