इति कठवल्लिषु ।'ब्रह्म वा इदमग्र आसीत्तदेकं सन्न व्यभवत्' 'नान्यो-ऽतोऽस्ति द्रष्टा' इत्यादि बृहदारण्यके ।'अनेजदेकं मनसोजवीय: .... तत्र को मोहः कः शोक एकत्वमनुपश्यत:'
In plain words
Thus it is said in the Katha Upanishad: 'Brahman alone was this in the beginning, and being one, it could not expand further.' And in the Brihadaranyaka: 'There is no other seer besides this.' And: 'Unmoving, one, swifter than the mind... What delusion or sorrow can touch one who beholds this absolute oneness?'
Close to the Sanskrit
Thus in the Katha texts. 'Brahman indeed was this in the beginning; that, being one, did not expand' and 'There is no other seer than this' and so forth in the Brihadaranyaka. 'Unmoving, one, swifter than the mind... Where is delusion, what is sorrow for one who perceives oneness?'