By whom is the inclination of beings, by whom all this is pervaded — worshipping Him through one’s own action, a human being attains perfection.

The method: yataḥ pravṛttir bhūtānām — He from whom is the tendency/activity of beings (the īśvara). Yena sarvam idaṃ tatam — by whom all this is extended/pervaded (the Brahman).

Sva-karmaṇā tam abhyarcya — worshipping Him through one’s own action. All work becomes yajña when offered to the Divine. The mānavaḥ (human) attains siddhi thus.