3.21 मग्नः स्वचित्तेन प्रविशेत् ॥२१॥ magnaḥ sva-cittena praviśet sūtra magnaḥ — immersed (in his own Self) ; sva-cittena — by his own (purified) mind ; praviśet — let him enter (the Heart) Immersed (in the Self), let him enter (the Heart) by his own (purified) mind.