Mbh 12.307.2b

When one does not hear, and smell, and taste, and see; when one is not conscious of any touch; when one's mind becomes perfectly free from every purpose; when one is not conscious of any thing, when one cherishes no thought; when one becomes like a piece of wood, then is one called by the wise to be in perfect Yoga. At such a time one shines like a lamp that burns in a place where there is no wind; at such a time one becomes freed even from one's subtile form, and perfectly united with Brahma. When one attains to such progress, one has no longer to ascend or to fall among intermediate beings. When persons like ourselves say that there has been a complete identification of the Knower, the Known, and Knowledge, then is the Yogin said to behold the Supreme Soul.[1622] While in Yoga, the Supreme Soul displays itself in the Yogin's heart like a blazing fire, or like the bright Sun, or like the lightning's flame in the sky. That Supreme Soul which is Unborn and which is the essence of nectar, that is seen by high-souled Brahmanas endued with intelligence and wisdom and conversant with the Vedas, is subtiler than what is subtile and greater than what is great. That Soul, though dwelling in all creatures, is not seen by them. The creator of the worlds, He is seen only by a person endued with wealth of intelligence when aided by the lamp of the mind. He dwells on the other share of thick Darkness and transcends him called Iswara.[1623] Persons conversant with the Vedas and endued with omniscience call Him the dispeller of Darkness, stainless, transcending Darkness, without attributes and endued therewith.