VALIS page 394: "i.e. before full term. This was the dark or Yin twin. Therefore it was defective. At full term the wiser twin emerged. Each twin formed a unitary entelechy, a single living organism made of psyche and soma, still rotating in opposite directions to each other. The full term twin, called Form I by Parmenides, advanced correctly through its growth stages, but the prematurely born twin, called Form II, languished.
The next step in the One’s plan was that the Two would become the Many, through their dialetic interaction. From them as hyperuniverses they projected a hologram-like interface, which is the pluriform universe we creatures inhabit. The two sources were to intermingle equally in maintaining our universe, but Form II continued to languish toward illness, madness and disorder. These aspects she projected into our universe."
The Amazing Digital Circus (2023)