6.133
upanisad-sabde yei mukhya artha haya
sei artha mukhya,--vyasa-sutre saba kaya
SYNONYMS
upanisad—of the Vedas; sabde—by the words; yei—whatever; mukhya—direct; artha—meaning; haya—is; sei—that; artha—meaning; mukhya—chief; vyasa-sutre—in the Vedanta-sutra; saba—all; kaya—describes.
Caitanya Mahaprabhu continued, "The Vedanta-sutra is the summary of all the Upanisads; therefore whatever direct meaning is there in the Upanisads is also recorded in the Vedanta-sutra, or Vyasa-sutra.
PURPORT
Srila Bhaktisiddhanta Sarasvati has explained the word upanisad in his Anubhasya.
Please refer to Adi-lila, Second Chapter, fifth verse, and Adi-lila, Seventh Chapter, verses 106 and 108, for his explanation.