The practice of expading one's body beyond the confines of ordinary experience :
na cittaṃ nikṣiped duḥkhe na sukhe vā parikṣipet |bhairavi jñāyatāṃ madhye kiṃ tattvam avaśiṣyate || 103 ||"One should not throw one's attention in pain,nor entirely in pleasure, o Goddess !One should know (their) center.(And then) what ? Being remains."
vihāya nijadehasthaṃ sarvatrāsmīti bhāvayan |dṛḍhena manasā dṛṣṭyā nānyekṣiṇyā sukhī bhavet || 104 ||"Having dropped away identifification to one's body (only),one should realize that 'I am everywhere'.Through (such a) stable mental gaze,one becomes independant from (any) 'other', (and hence)one shall be at ease."