Prose passage
। । २० ॥
In plain words
The body, indriyas, Manas, and Buddhi carry out their own activities by depending on Ātma-caitanya, just as people act by the light of the sun.
Close to the Sanskrit
Depending upon Ātma-caitanya, the body, indriyas, Manas, and Buddhi engage in their respective activities, just as people do by the light of the sun.