The works of Ādi Śaṅkarācārya

Muṇḍakopaniṣadbhāṣyam

Avatarika

Avatarika

अपरविद्याया सर्वं कार्यमुक्तम् ।स च संसारो यत्सारो यस्मान्मूलादक्षरात्संभवति यस्मिंश्च प्रलीयते, तदक्षरं पुरुषाख्यं सत्यम् ।यस्मिन्विज्ञाते सर्वमिदं विज्ञातं भवति, तत्परस्या ब्रह्मविद्याया विषय ।स वक्तव्य इत्युत्तरो ग्रन्थ आरभ्यते—

In plain words

The entire scope of lower knowledge has been set forth. Now begins the text that reveals the Imperishable Reality—the true Purusha from which the world arises and into which it dissolves, knowing which everything is known.

Close to the Sanskrit

All effect of lower knowledge has been stated. And that samsara, whose essence is originating from that root which is the imperishable and dissolving into it—that imperishable, true reality named Purusha, knowing which all this becomes known, is the subject matter of supreme knowledge. That is to be explained; therefore the subsequent text is commenced.