Kabbalah sa Isaias 4:3: Sha'arei Orah

Now, at times this Divine quality is called The Book of Life-Sefer HaChayim-ספר החיים. This is because it is a repository within which life is drawn from the Supernal Life that is called the “Life of the Coming World.” This life is drawn to it from HaShem’s-יהו"ה Divine quality called the Living God-El Chai-אל חי and is analogous to a book in which one writes. So it is with this quality. All forms are given depiction in it, each to their kind, whether for death or for life, as written,²⁵³Deuteronomy 32:39 “I-Anee-אני put to death and I bring to life.” Similarly, it is written,²⁵⁴Isaiah 4:3 “Everyone who is inscribed for life in Jerusalem,” because this quality is also called Jerusalem-Yerushalayim-ירושלם, after a known quality.²⁵⁵As mentioned before, our sages, of blessed memory, explain that the name Jerusalem-Yerushalayim-ירושלם refers to the fear of HaShem-יהו״ה, blessed is He, and is thus equal to “perfect fear-Yirah Shalem-ירא״ה של״ם” (See Midrash Bereishit Rabba 56:10). With the help of HaShem-יהו״ה, we will explain all these matters according to their proper order and intent and with full explanations, when we come to HaShem’s-יהו"ה Divine quality called, the Living God-El Chai-אל חי.