Om Hrim. The sound of Om is the most ancient and potent Hindu mantra. It is the primordial vibration that lights the bindu or Center of existence. One source says that the word Hrim denotes the unity of the male and female principles or all opposition. Others suggest that the H stands for Siva, the R for Prakriti or nature, the I for Maya or creative play, the M for the dispeller of sorrow. Hrim is also the seed mantra of the goddesses Tripura-Sundari, and Tripura- Bhuvanesvari, two of the Mahavidyas presented elsewhere in these pages.