OM - Sound of Creation
Due to our limited human consciousness, the world that we naively comprehend as reality, is in truth only a transient vision. It is the work of maya — the power of illusion. However, That which is full of transcendent awareness, That which is eternal, unchanging, undivided, Omnipresent and Omniscient, without definition, attribute or form, That which is unbound, pure and perfect, which has no beginning and no end, this vibration or energy fills the whole universe and in the Vedas it is called:
OM is reality. OM is truth. OM is the pure consciousness upon which all wise men and yogis meditate. OM is liberation and perfection. OM is the Divine. OM is the ultimate power which creates and preserves the cosmos. With reverent salutations I make my obeisance to OM.
from Lila Amrit - The Divine Life of Sri Mahaprabhuji
by Paramhans Sri Swami Madhavanandaji