The works of Ādi Śaṅkarācārya

Bṛhadāraṇyakopaniṣadbhāṣyam

Avatarika

Avatarika

सर्वोपनिषदां परमात्मैकत्वज्ञापनपरत्वे अथ किमर्थं तत्प्रतिकूलोऽर्थः विज्ञानात्मभेदः परिकल्प्यत इति ।कर्मकाण्ड-

In plain words

If every Upanishad exists to teach that the Supreme Self is one — then why does the teaching ever posit something that seems to contradict that, a real difference in the individual self? Is it for the sake of ritual—

Close to the Sanskrit

Since all the Upanishads are devoted to teaching the oneness of the Supreme Self — then why is a notion opposed to that, the distinctness of the individual self, imagined? For the sake of the ritual section—