गोविन्द भाष्य (श्रील बलदेव विद्याभूषण - अचिन्त्यभेदाभेद वेदान्त ब्रह्मसूत्र भाष्य सटीक)

jñāninas tattva-darśinaḥ
"Just try to learn the truth by approaching a spiritual master. Inquire from him
submissively and render service unto him. The self-realized soul can impart
knowledge unto you because he has seen the truth."*
The material benefits obtained by following the pious rituals of the karma-
kāṇḍa section of the Vedas are all temporary in nature. This fact is confirmed by
the following statement of Chāndogya Upaniṣad (8.1.3):
tad yatheha karma-cito lokāḥ kṣīyante evam evāmutra puṇya-cito lokaḥ kṣīyate
"By performing good works (karma) one is elevated to the celestial material
world after death. One is not able to stay there forever, however, but one must lose
that position after some time and accept another, less favorable residence. In the
same way, by amassing pious credits (puṇya) one may reside in the upper planets.
Still, he cannot stay there, but must eventually relinquish his comfortable position
there, and accept a less favorable residence somewhere else."
The following statement of Muṇḍaka Upaniṣad (1.2.12) affirms that only
transcendental knowledge will help one approach the Supreme Brahman:
parīkṣya lokān karma-citān brāhmaṇo
nirvedam ayan nāsty akṛtaḥ kṛtena
tad-vijñānārtham sa gurum evābhigacchet
samit-pāṇiḥ śrotriyaṁ brahma-niṣṭham
"Seeing that the celestial material planets, which one may obtain by pious work,
provide only temporary benefits, a brāhmaṇa, in order to understand the truth the
of the Supreme Personality of Godhead, should humbly approach a bona-fide
spiritual master learned in the scriptures and full of faith in the Supreme Lord."
In contrast to the temporary material benefits obtained in the celestial material
planets, the Supreme Brahman is the reservoir of eternal, limitless bliss. This is
confirmed by the following statments of Taittirīya Upaniṣad (2.1.1):
satyaṁ jñānam anantaṁ brahma
"The Supreme Personality of Godhead is limitless, eternal, and full of
knowledge."