Thirty Minor Upanishads
Chapters
Thirty Minor Upanishads: 30. Yogakuṇdalī-Upani...

The Śakṭi named kunḍalinī, which is like a thread in the lotus and is resplendent, is biting with the upper end of its hood (namely, mouth) at the root of the lotus the mūlakanḍa. Taking hold of its tail with its mouth, it is in contact with the hole of brahmaranḍhra (of sushumnā). If a person seated in the pad ma posture and having accustomed himself to the contraction of his anus makes his vāyu go upward with the mind intent on kumbhaka, then agni comes to svāḍhishthāna flaming, owing to the blowing of vāyu. From the blowing of vāyu and agni, the chief (kunḍalinī) pierces open the brahmagranṭhi and then vishṇugranṭhi. Then it pierces ruḍragranṭhi, after that, (all) the six lotuses (or plexuses). Then Śakṭi is happy with Śiva in sahasrāra kamala (1,000 lotuses’ seat or pineal gland). This should be known as the highest avasṭhā (state) and it alone is the giver of final beatitude. Thus ends the first chapter.

Chapter II

I shall hereafter describe the science called khecharī which is such that one who knows it is freed from old age and death in this world. One who is subject to the pains of death, disease and old age should, O sage, on knowing this science make his mind firm and practise khecharī. One should regard that person as his guru on earth who knows khecharī, the destroyer of old age and death, both from knowing the meaning of books and practice, and should perform it with all his heart. The science of khecharī is not easily attainable, as also its practice.