The works of Ādi Śaṅkarācārya

Bṛhadāraṇyakopaniṣadbhāṣyam

Verse 144

यो वायौ तिष्ठन्वायोरन्तरो यं वायुर्न वेद यस्य वायुः शरीरं यो वायुमन्तरो यमयत्येष त आत्मान्तर्याम्यमृतः ॥ ७ ॥

In plain words

The one who lives within the wind, yet is other than the wind, whom the wind itself does not know, whose body the wind is, who governs the wind from inside -- he is your self, the one who rules from within, and he does not die.

Close to the Sanskrit

He who, dwelling in the wind, is other than the wind, whom the wind does not know, whose body is the wind, who controls the wind from within -- he is your self, the inner controller, immortal.