The fourth is without element, beyond dealings, the cessation of the world, benign, non-dual. Thus Om is the very Self. One who knows this enters the Self by the Self.
अमात्रश्चतुर्थोऽव्यवहार्यः प्रपञ्चोपशमः शिवोऽद्वैत एवमोङ्कार आत्मैव संविशत्यात्मनाऽऽत्मानं य एवं वेद ॥ १२॥