The absolute may be symbolized as "AUM" The aum is unitary in nature and thus chosen to represent the absolute It has three letters A-U-M The letter a symbolizes the wakeful state The u symboloses the dream state The m symbolizes the deep sleep The silence that follows aum is important The silence is the symbolic of the absolute The AUM is a mantra that denotes the four stages of phenomenology The wakefulness, dream, sleep and the absolute truth