In connection with the mystery of inwardness . . . we should perhaps mention here the power of the MANTRA, of the word in its “uncreated” essence – thus a priori inward or cardiac – and interiorizing from the standpoint of the outward ego. The MANTRA is a revealed substitute of the primordial sound; purifying and saving, it is a manifestation of the Shakti as power of union. (GTUFS: RootsHC, Mahashakti)