“This Ātmā is represented by the [supreme] syllable Om, which is represented in its turn by letters [mātrās], [in ”“such a way that] the conditions [of Ātmā] are the mātrās [of Om], and (conversely) the mātrās [of Om] are the conditions [of Ātmā]: these are A, U, and M.” Excerpt From: Rene Guenon. “Man and His Becoming According to the Vedanta (Rene Guenon Works).” iBooks.