"This knowledge was imparted (by Nārāyaṇa) to Apānṭaraṭama who in turn imparted it to Brahmā. Brahma imparted it to Ghora-Aṅgiras. He imparted it to Raikva, who in turn imparted it to Rāma. Rāma imparted it to all creatures. This is the teaching of Nirvāṇa; this is the teaching of the Veḍas; yea, this is the teaching of the Veḍas."

Khaṇda VIII

"The Āṭmā of all which is immaculate, is located within the cave in the body. Āṭmā which lives in the midst of the body filled with fat, flesh and phlegm in a seat very closely shut up with shining many-coloured walls resembling a Ganḍharva city and with the (subtle) essence going out of it (to other parts of the body), which seat may be likened to a plantain flower and is ever agitated like a water-bubble—this Āṭmā is of an unthinkable form, the Divine Deva, associateless and pure, has ṭejas as its body, is of all forms, the Lord of all, the unthinkable and the bodiless, placed within the cave, immortal, shining, and bliss itself. He is a wise person who cognizes Āṭmā thus, and not one who does not do so."

Khaṇda IX

Once Raikva questioned Him (Lord) thus: "O Lord, in whom does everything disappear (or merge)?" He replied thus: "That which (or he who) disappears in the eye becomes the eye only; that which disappears in the visible becomes the visible only; that which disappears in the sun becomes sun only; that which disappears in Virāt becomes Virāt only; that which disappears in prāṇa becomes prāṇa only; that which disappears in vijñāna becomes vijñāna only; that which disappears in ānanḍa becomes ānanḍa only; that which disappears in ṭurya becomes ṭurya only—(all these) attain that which is deathless, fearless, sorrowless, endless, and seedless."

Then He continued: "That which disappears in the ear becomes ear itself; that which disappears in the audible becomes the audible only; that which disappears in ḍik (space) becomes ḍik only; that which disappears in suḍarśanā (discus) becomes suḍarśanā only: that which disappears in apāna becomes apāna only; that which disappears in vijñāna becomes vijñāna only; that which disappears in ānanḍa become ānanḍa only; that which disappears in ṭurya becomes ṭurya only—(all these) attain that which is deathless, fearless, sorrowless, endless, and seedless."

Then He continued: "That which disappears in the nose becomes nose only; that which disappears in the odoriferous becomes odoriferous only; that which disappears in pṛṭhivī becomes pṛṭhivī only; that which disappears in jiṭam (victory) becomes; victory only; that which disappears in vyāna becomes vyāna only; that which disappears in vijñāna becomes vijñāna only; that which disappears in bliss becomes bliss only; that which disappears in ṭurya becomes ṭurya only—(all these) attain that which is deathless, fearless, sorrowless, endless, and seedless."