Dear one, when you rise above the bhṛukuti ṁahala, i.e, the ajña cakra, you would see the inner light of infinite wisdom. Through the constant chanting of ‘That I am’ you would reach the entrance of the tenth opening.
(The rest nine open towards outside or bahyākāśa, while the tenth one known as brahmarandhra is a spiritual opening which opens inwards towards citākāśa).
The stream of spiritual consciousness flows in a reverse way from the bottom to the top, through the serpentine spinal cord, situated within the backbone. O dear one, you should plunge yourself into this stream to ascend to higher consciousness.
Using the vehicle of praṇava japa, You should ascend higher and higher reaching the top of suṣumnā patha. There, overcoming the identity of the self with the body, you would find yourself singing with joy. ‘That I am’, ‘That I am’.
Even higher than that, to the highest peak of experience of Brahman within, reaching there with the sound of oṁ, you should enjoy the bliss of creative dynamism of all pervading consciousness.
You would find yourself spontaneously in a state of indescribable joy, with an experience of blissful pure consciousness. I pay my obeisance to Guru Śivānanda, who has guided me in this experience.