येनाविष्टो यस्य च शक्त्या यदधीनःक्षेत्रज्ञोऽयं कारयिता जन्तुषु कर्तुः ।कर्ता भोक्तात्मात्र हि यच्छक्त्याधिरूढ-स्तं संसारध्वान्तविनाशं हरिमीडे ॥ २१ ॥
In plain words
He has entered it; it runs on his power; it stands only in dependence on him — and so this knower of the field, in every living creature, is what sets the doer to work. The self here is doer and experiencer, yes — seated where it sits by his power alone. Him I praise: Hari, the ending of saṃsāra's darkness.
Close to the Sanskrit
Entered by whom, and by whose power, dependent upon whom, this knower of the field is, in living beings, the instigator of the doer; the self here indeed is doer and experiencer, seated in place by whose power — him, the destruction of the darkness of saṃsāra, Hari, I praise.