p. 266
यस्मात्सत्यनिष्ठस्यैव ब्राह्मणत्वप्रसिद्धिः, तस्मात् विषयपरो न भवेदित्याह—
In plain words
Brāhmaṇa-hood is established in one thing only: standing firm in truth. So do not become one whose life is set on sense-objects — this is what he says next:
Close to the Sanskrit
Since the establishment of brāhmaṇa-hood belongs to one grounded in truth alone, therefore one should not be devoted to sense-objects — thus he says: