को ह्येवान्यादात्मनि न स्यादयमेषह्येवानन्दः प्राणिति चापानिति चेति ।इत्यस्तित्वं वक्त्युपपत्त्या श्रुतिरेषातं संसारध्वान्तविनाशं हरिमीडे ॥ ३४ ॥
In plain words
Who would draw a single breath, if this were not there in the Self — this, this very bliss? It breathes out. It breathes in. That is how this śruti, reasoning it through, declares that He is. Hari, the destroyer of the darkness of saṃsāra — He is the one I praise.
Close to the Sanskrit
Who indeed would breathe at all, if this were not in the Self — this, this very bliss? It breathes out and it breathes in — thus. Thus, by cogent reasoning, this śruti declares His existence. Him, the destroyer of the darkness of saṃsāra, Hari, I praise.