The radiance of Adam Kadmon.
Adam Kadmon's anatomy involves radiations from sensory organs — the cosmogonic source of the four expansions AV (gematria 72), SaG (gematria 63), MaH (gematria 45), BaN (gematria 52).
Op. 31 named Adam Kadmon. Op. 32 begins to describe its anatomy — specifically, the radiances by which AK's interior structure becomes the operational vocabulary of the cosmogonic chapters. The chapter is short, but it sets up the radiation-from-organs picture that runs through Op. 33–35.
The sod hatemunah principle of Op. 13 (every prophetic form is read by analogy to the corresponding form in the lower world) applies here at the cosmogonic level. Adam Kadmon's form is the Likeness of Man; its anatomy therefore involves cosmic counterparts of human anatomical features — head, eyes, ears, mouth, forehead, body. From each of these features radiations emerge, and the radiations are the four expansions of the Four-Letter Name.
AV emerges from the eyes (or sometimes the head); SaG from the ears; MaH from the forehead; BaN from the eyes in their other aspect. The specifics are unfolded in Op. 34. What Op. 32 establishes is the principle: AK's anatomical features are the cosmic source of the operational expansions that run through the rest of the book.
This is also the cosmogonic seed of koneniyut — the mechanical-clock interaction by which one cosmic level couples with another (Op. 70 will name this formally). The radiations from AK's organs connect to the levels below; the connections are the operational links of the entire cosmic government.