 The word mantra derives from the Sanskrit expression ‘"mananaath thraayathe"’ which loosely means “a transforming thought”; literally, “that which, when thought, carries one across [the worldly ocean of sorrow]”.The power of a mantra lies in its ability to produce an objective, perceptible change in the yogi who repeats it correctly.In the yoga tradition, Aum is the most sacred of holy words, the supreme mantra.