Back-to-Back — and the Separation to come Face-to-Face.
The Nesirah — the separation of Nukva from Zeir Anpin (Z"A), drawn from Genesis 2:21–22. Back-to-Back becomes Face-to-Face.
Op. 135 names the Nesirah — the cosmic-operational separation of Nukva from Z"A. The biblical anchor is Genesis 2:21–22's He took one of his sides — the rabbinic-traditional reading of how Eve was made from Adam's side. Klach reads this cosmologically: the Nesirah is the structural mechanism by which Nukva acquires her own operational identity.
Before the Nesirah, Z"A and Nukva are Back-to-Back. They are structurally connected, but they cannot face each other operationally. The connection is intimate but not yet coupling-ready in the full sense.
The Nesirah separates Nukva from Z"A's back. After the separation, Nukva exists as her own Partzuf — distinct, operationally identifiable. The two can now turn Face-to-Face — the prerequisite for full operational coupling.
This is the cosmic-anatomical operationalisation of Genesis 2:21–22. He took one of his sides — Klach reads one of his sides as one of Z"A's sides, specifically Z"A's back. And built the side... into a woman — the constructed woman is Nukva proper, now operationally distinct.
The operational consequence: the Coupling Op. 136 will treat depends on the Nesirah. Without Nesirah, no Face-to-Face position; without Face-to-Face, no full Coupling. The Nesirah is the prerequisite for the cosmic government's deed-dependent operating mode.
Op. 136 (Z"A and Nukva, when complete, are ready for Interior and Exterior coupling). Op. 138 (the eight-stage Coupling order — the operational completion).