One of the most popular symbols across many cultures, religions and teachings is the Om symbol. Indian philosophy tells us that God first created sound, from which the universe sprang. Om (also Aum), is the most sacred sound and the foundation of the universe and everything in existence, holding all together.
Om is a Hindu Mantra, the greatest mantra. By its threefold nature, it symbolizes several sets of three: The three worlds (heaven, earth, and atmosphere). The three major gods of Hinduism (Vishnu, Sava, and Brahma). The three Vedic scriptures (Sama, Yajur,and Rg). Hindus speak the sacred syllable to begin and to end prayers, meditation, and mantras. Om mystically evinces the essence of the entire universe.