saiṣā hy upaniṣad brāhmī
pūrveśāḿ pūrva-jair dhṛtā
śrraddhayā dhārayed yas tāḿ
kṣemaḿ gacched akiñcanaḥ
sa esha -- this same; hi -- indeed; upanishat -- Upanishad, confidential spiritual doctrine; brahmi -- related to the Absolute Truth; purvesham -- of our predecessors (such as Narada); purva-jaih -- by the predecessors (such as Sanaka); dhrita -- meditated upon; sraddhaya -- with faith; dharayet -- meditates; yah -- whoever; tam -- upon it; kshemam -- ultimate success; gacchet -- will attain; akincanah -- free from material connection.
This confidential knowledge concerning the Absolute Truth should not be doubted, since it has been passed down through authoritative lines of learned sages from time immemorial. One who cultivates the science of the Supreme with reverence, avoiding the distractions of fruitive rituals and mental speculation, will learn to give up the false designations of material body and mundane society, and thus he will become eligible for perfection.
In the opinion of Srila Visvanatha Cakravarti, the first two verses of this chapter can be considered an Upanishad on the topic of Brahman. Sukadeva Gosvami here disclaims authorship on the grounds that this Upanishad was spoken previously by Narada Muni, who himself heard it from Sanaka Kumara.