bhuta-sargah-creation of matter; trtiyah-is the third; tu-but; tat-matrah-sense perception; dravya-of the elements; saktiman-generator; caturthah-the fourth; aindriyah-in the matter of the senses; sargah-creation; yah-that which; tu-but; jnana-knowledge acquiring; kriya-working; atmakah-basically.