p. 259
य एवं स्वाभाविकचित्सदानन्दाद्वितीयब्रह्मात्मनावस्थितः, स एव ब्राह्मण इति दर्शयिष्यन् तद्व्यतिरिक्तस्य सर्वस्य तदज्ञानमूलत्वं दर्शयति—
In plain words
The one who stands settled in this way, as that very Self which is brahman — consciousness, being, bliss, its own nature, without a second — he alone is a brāhmaṇa. About to show this, the text first shows that everything other than that Self has ignorance of that Self as its root—
Close to the Sanskrit
He who thus stands established as the Self which is brahman — innate consciousness, being, bliss, without a second — he alone is a brāhmaṇa: intending to show this, he shows that everything other than that has ignorance of that as its root—