udāna-gatyorasi taṁ nayen muniḥ
tato ’nusandhāya dhiyā manasvī
sva-tālu-mūlaṁ śanakair nayeta
There are six circles of the movement of the life air, and the intelligent bhakti-yogī should search out these places with intelligence and in a meditative mood. Among these, mentioned above is the svādhiṣṭhāna-cakra, or the powerhouse of the life air, and above this, just below the abdomen and navel, is the maṇi-pūraka-cakra. When upper space is further searched out in the heart, one reaches the anāhata-cakra, and further up, when the life air is placed at the root of the palate, one reaches the viśuddhi-cakra.