Sri Aurobindo translates Taittiriya Upanishad, Bhriguvalli, Chapter 10, part 4: “The Spirit who is here in man and the Spirit who is there in the Sun, lo, it is One Spirit and there is no other. He who hath this knowledge, when he goeth from this world having passed to the Self which is of food; having passed to the Self which is of Prana; having passed to the Self which is of Mind; having passed to the Self which is of Knowledge; having passed to the Self which is of Bliss, lo, he rangeth about the worlds, and eateth what he will and taketh what shape he will and ever he singeth the mighty Sama. ‘Ho! ho! ho! I am food! I am food! I am food! I am the eater of food! I am the eater! I am the eater! I am he who maketh Scripture! I am he who maketh! I am he who maketh! I am the firstborn of the Law; before the gods were, I am, yea, at the very heart of immortality. He who giveth me, verily he preserveth me; for I being food, eat him that eateth. I have conquered the whole world and possessed it, my light is as the sun in its glory.’ Thus he singeth, who hath the knowledge. This verily is Upanishad, the secret of the Veda.”
Sri M. P. Pandit observes: “He is everywhere, indeed! But in you also … And he who has imbibed and realised this High Knowledge does not decay and wither away in death like other creatures in the Ignorance. On the other hand, — proclaims the sacred text in one of the most memorable and inspired perorations in Indian spiritual literature — he attains a sublime liberation. When the time arrives for him to leave the terrestrial life, he withdraws from it in a masterly manner, passing in controlled steps from state to state, each perfected, within, during the lifetime, till he arrives at his rightful destination of ineffable Ananda. … In the utter beatitude that is now his natural state, he realises an untrammelled identity with Brahman in each if His varied statuses, the transcendent, the cosmic, the individual … It is not to be concluded however that a complete identity with Brahman is possible only after the death of the physical body. It is possible to attain it here even while living.”
It is clear, when one hears the ecstatic utterance of this passage that the seeker is in a state of blissful awareness and has achieved a realisation that has overpowered the ordinary mental processes. The insights are quite clear however. He has recognized his unity with the Brahman in the manifestation and beyond the manifested world. He systematically recognizes Matter and the Life-Energy which devours and transforms the forms of Matter. He recognizes the Mental world where thought and logical development take place as well as that level of consciousness which transcends the mental level. He understands that the Brahman has manifested this entire universe and, being One with the Brahman, he is One with the entire manifested world, while still transcending everything that exists.