Note 248:1 — Chapter XXVI
Reading edition
O. M. or A. U. M. is the Hindoo ineffable name; the mystic emblem of the deity. It is never uttered aloud, but only mentally by the devout. It signifies Brahma, Vishnou, and Siva, the Hindoo Trinity. (See Charles Wilkes in Geeta, p. 142, and King's Gnostics and their Remains, p. 163.)