I have read that the divine triad separates itself from the inferior quaternary before the inferior quaternary descends into the abyss.

Buddhi is the second aspect of the divine triad.

Master Samael says that Buddhi is the consciousness.

Isn't the purpose of the abyss to purify the consciousness? If Buddhi is the consciousness, and it is separated from the inferior quaternary before the inferior quaternary descends into the abyss, how is the consciousness purified in the abyss?