A mantra or sacred chant. The potentcies of sound and of "vach," the human voice, have nowhere else been so profoundly investigated as in India and China (Taoism). The aum vibration that reverberates throughout the universe has three manifestations of "gunas;" those of creation, preservation, and destruction. - Taittiriya Upanishad 1:81 (Sometimes conceived as G.O.D.*). Each time a man utters a word he puts into operation one of the three qualities of "aum." This is the lawful reason behind the injunction of all scriptures that man should speak the truth.
* Generation, Organizing, Dissolving, i.e., G.O.D.