The connection of Beriyah, Yetzirah and Asiyah with Atzilut.
ABYA — Atzilut, Beriyah, Yetzirah, Asiyah — is one world with three garments. Imma, Zeir Anpin (Z"A), and Nukva nest as the structural form of the three lower worlds.
Op. 36 opened the Nekudim unit by defining Nekudim as the successive (un-integrated) state. Op. 38 takes the next structural step: even after the eventual integration, the four worlds (ABYA) are not four separate worlds. They are one world with three garments — Imma garbs Z"A, Z"A garbs Nukva, and the result is the integrated cosmos.
The one world with three garments doctrine has its source in Tikkuney Zohar #6 (23a). The four worlds — Atzilut (the world of emanation), Beriyah (creation), Yetzirah (formation), Asiyah (action) — are not four parallel cosmoses but four aspects of one integrated structure. Atzilut is the inner reality; Beriyah, Yetzirah, and Asiyah are the garments that wrap Atzilut and present its directives at progressively coarser levels.
The nesting goes anatomically through the upper Partzufim. Imma (the operational Mother) garbs Z"A (the operational Masculine); Z"A garbs Nukva (the operational Feminine). The operational Partzufim themselves — Imma, Z"A, Nukva — are how the four worlds nest. When you reach Asiyah at the bottom, you are operating through Yetzirah, through Beriyah, through Atzilut, through the Imma–Z"A–Nukva operational configuration of the upper Partzufim.
This structural claim is what makes the second half of the book intelligible. Every operational cosmic action — flow of mercy, judgment-and-sweetening, coupling and pregnancy — operates through the entire ABYA stack. The action at Atzilut becomes legible at Asiyah by the garment-nesting Op. 38 establishes.
Op. 47 will describe how the breaking-and-repair restructures BYA-of-Nekudim into ABYA proper. Op. 96 will name the chain AK → Atik Yomin → A"A → Atzilut, which presupposes the ABYA architecture Op. 38 establishes. The closing chapters' Coupling-order doctrine (Op. 138) operates inside the ABYA-as-one-world framework.