“The center of the divine lotus is the core — Krsna's residence. It is presided over by the Predominated and Predominating Deity. It is mapped as a hexagonal mystic symbol [sat-konam]. Like a diamond, the effulgent Supreme Entity of Krsna, the Fountainhead of all divine potencies, presides as the central pivot. The great mantra of eighteen syllables [Gopala-mantra], which is formed of six integral parts, is manifest as a hexagonal place with six-fold divisions.”

[Sri Brahma-samhita, Ch-5, Tx-3]