ओमित्येकाक्षरं ब्रह्म व्याहरन्मामनुस्मरन्।
यः प्रयाति त्यजन्देहं स याति परमां गतिम्।।8.13।।
।।8.13।। जो पुरुष ओऽम् इस एक अक्षर ब्रह्म का उच्चारण करता हुआ और मेरा स्मरण करता हुआ शरीर का त्याग करता है वह परम गति को प्राप्त होता है।।
Except through the Brahmanadi which is one of the 100 nerve centers in the crown of the head; if the life force of a jiva or living entity exits the body by any of the other 99 nerve centers it gets diverted and recycled back into samsara the perpetual cycle of birth and death without attaining moksa or liberation. Both the Vedic scriptures Vyasa Yoga and Moksa Dharma are specify that when jivas exits through the eyes they go to the sun, when they exit through the ears or any of the 99 centers they go to the place that corresponds with it but they all remain in the physical manifestation and do not lead to the spiritual plane as does the Brahmanadi.The word hrdi- nirudhya means confined to the heart and denotes meditating on the atma or soul and the Supreme Lord Krishna. The Padma Purana states: Because He attracts He is in the hearts of all jivas and attracts them towards Himself, He is known as Hrdi the heart. When the life force is stationed in the head it is not possible to abide in the heart. The Vyas Yoga states: Wherever the life force abides that is where the jiva and the mind also abide. Thus only the one who has prepared themselves throughout their lives in proper mediation is able to concentrate in equanimity and is fully able to be in equanimity. This is the purport. Now begins the summation. As the Supreme Lord Krishna is symbolised by the one word OM His personalised transcendental sound vibration, the brahman or spiritual substratum pervading all existence is also known by the one word OM.