In her First Fundamental Proposition, H.P. Blavatsky labelled the Kosmos in Eternity as the "Omnipresent, Eternal, Boundless, and immutable PRINCIPLE." This "ONE ABSOLUTE" is symbolized by "finite intelligence as the theological Trinity," or the immaculate white disk, the dull black ground, and the central point. This triad is presented as a symbol because the One Principle transcends "human conception," all "speculation," and the "reach of thought." In this sense, the First Fundamental Proposition is Kantian, per Critique of Pure Reason (1781) on page 378. Immanuel Kant wrote, "Reason tries at first, with the illusion of great plausibility, to establish its principle of unconditioned unity, but soon becomes entangled in so many contradictions that it must, with regard to cosmology, give up." When dealing with the ground of existence, the human mind allows both thesis and antithesis in a dialectic to be reasonable positions, thereby preventing it from ever arriving at a synthetic One-ness.
While the human mind might not be able to understand One-ness, it can investigate the dual "aspects" of that One-ness: "Spirit (or Consciousness) and Matter." Spirit-Consciousness as "pre-Cosmic Ideation" (meaning the Divine Thought of Parabrahman) pours out from the immaculate white disk into the central point that subsequently establishes Cosmic Ideation in the Mundane Egg. Matter as "pre-Cosmic Substance" is the dull black ground of Mulaprakriti through which Spirit-Consciousness has to traverse in order to fire up the minds of the intelligences in the Mundane Egg. Since Spirit-Consciousness is a combination of the immaculate white disk and the central point while Matter is the dull black ground, all dualistic human conceptions inherently evolve into a triad when dealing with the ground of existence.
In order to step over the barrier from pre-Cosmic Ideation to Cosmic Ideation, Divine Thought needs a "bridge." This bridge is Fohat (another example of dualistic thought becoming triadic). Fohat is the "dynamic energy of Cosmic Ideation." This explains why Fohat is usually expressed in terms of Paramatman, or the highest of the seven cosmic principles, in theosophical literature. Of course, Fohat is also expressed in theosophical literature as the bridge between the Central Sun and our Solar Sun (or undifferentiated and differentiated matter) where the energies of the Central Sun thrill through all seven layers of the Mundane Egg to invigorate the "Dhyan Chohans."
Sources:
H.P. Blavatsky, The Secret Doctrine (Pasadena: Theosophical University Press, 2019).
Immanuel Kant, Critique of Pure Reason, trans. Marcus Weigelt (London: Penguin Books, 2007).
(Photo by Rich Meyers on Unsplash)