A Constructive Survey of Upanishadic Philosophy c4.s2.2.4

c4.s2.2.4

We have also an adumbration of the later Haṭhayoga practices such as those of pressing the tongue against the palate, and conveying the breath through the Suṣumnā (VI. 18-21), and finally a description of the seven mystical sounds which are heard in the process of contemplation, namely, those of a river, a bell, a brazen vessel, a wheel, the croaking of frogs, the pattering of rain, and finally a voice which comes from a place of seclusion (VI. 22).