upaniṣad-śabde yei mukhya artha haya
sei artha mukhya, — vyāsa-sūtre saba kaya

 upaniṣad - of the Vedas; śabde - by the words; yei - whatever; mukhya - direct; artha - meaning; haya - is; sei - that; artha - meaning; mukhya - chief; vyāsa-sūtre - in the Vedānta-sūtra; saba - all; kaya - describes.


Text

Caitanya Mahāprabhu continued, “The Vedānta-sūtra is the summary of all the Upaniṣads; therefore whatever direct meaning is there in the Upaniṣads is also recorded in the Vedānta-sūtra, or Vyāsa-sūtra.

Purport

Śrīla Bhaktisiddhānta Sarasvatī has explained the word upaniṣad in his Anubhāṣya. Please refer to Ādi-līlā, second chapter, fifth verse, and Ādi-līlā, seventh chapter, verses 106 and 108, for his explanation.