Verse 4

येन प्रस्पन्दते चित्तं येन न स्पन्दते तथा ।तद्ब्रह्मन्ब्रूहि मे येन चिकित्सेयं तदेव हि

In plain words

Śrī Rāma said: By what does citta come to vibrate, and by what, likewise, does it not vibrate? Tell me, O brahman, that very thing by which I may treat it.