space; Brahman. Akasha tattwa is the ether element, see Tattwas Akasha Dharana preparatory practice for Laya Yoga ...
The second stage is akasha tattwa or the ether element which is slightly denser than the mind. Then comes vayu tattwa, (the air element) an element denser than akasha. Next we have agni tattwa (the fire element) an element denser than vayu.
For hearing (ear) it is Akasha Tattwa. There is a subtle relation between the sense organs and there corresponding principles.
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