यो वायौ तिष्ठन् वायोरन्तरो यं वायुर्न वेद यस्य वायुः शरीरं यो वायुमन्तरो यमयत्येष त आत्मान्तर्याम्यमृतः ॥३,७.७ ॥
In plain words
He who dwells in the wind, yet is within the wind, whom the wind does not know, whose body the wind is, who from within controls the wind — he is thy Self, the inner controller, the immortal.