In the beginning was the Word. Om is said to be the primordial sound from which the entire universe was created; chanting Om helps relax the body, brain, and nervous system. Wearing the symbol can help bring a state of peace.
The bottom curve equates to the waking state, the five senses: the middle curve
is the dream state, the top curve is deep sleep; the top semi-circle represents Maya, illusion, keeping us from reaching the dot - transcendence.