Aum

According to Hindu philosophy there are three principle gods, the trinity as it’s called, Brahma the creator, Vishnu the protector and Shiva the destroyer. All other heavenly beings are considered to be reincarnations or manifestations of these three principle entities.
The universe is in Brahma consciousness, created by Brahma, hence the Sanskrit phrase Aham Bramhasmi “I am Brahma”. Which tires to remind us that I am he, a divine being made in the image of god himself.
Lord Vishnu is the divine sustainers and Lord Shiva represents the destroyer of evil or veil of Maya.
Maya is cosmic disillusion, Satan according to the bible which prevents us from realizing our true divinity.
Maya keeps us in ego conscious with its limitations and individuality making us feel that we are separate being and that our physical body and surrounding are in fact the only reality.
This trinity of Brahma Vishnu and Shiva are represented by AUM. The syllable ‘Aa’ is Brahma, ‘U’ Vishnu and ‘M’ Shiva. When we chant AUM we capture the entire cosmos, all words, all things all of everything stems out of this universal sound of vibration. Thus there can never exist any word more powerful than AUM because the word includes Everything.
Yoga means to join. Joining of the Atma to the paramatma. A yogi is a seeker of Cosmic consciousness, seeking the non-dual every lasting bliss (in Sanskrit “Sat chit Ananda”) which in more colloquial terms is God. As a true yogi has an expansion of consciousness, he reaches the realm of the AUM consciousness where he experiences the whole universe as a vibratory outcome of the AUM chant. This is an evolved state of being wherein the observer, the observation and the observed become one.
Anyways for starters, AUM meditation can be a very powerful stress buster, a simple 5 min a day chant can work miracles into your life. Try it because when you chant AUM you are in tune with the song of the Universe.

(Sat: True, pure Chit: consciousness Ananda: bliss)