वायुर्यथैको भुवनं प्रविष्टो रूपं रूपं प्रतिरूपो बभूव । एकस्तथा सर्वभूतान्तरात्मा रूपं रूपं प्रतिरूपो बहिश्च ॥ १०॥

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English Translation

As the same non-dual air, after it has entered the world, becomes different according to whatever it enters, so also the same non-dual Atman, dwelling in all beings, becomes different according to whatever It enters. And It exists also without. 

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English Commentary

Sri Shankara’s Commentary (Bhashya) translated by S. Sitarama Sastri

So, another illustration (is offered by ‘as wind though one’, etc.). The analogy is complete, as he enters all bodies as prâtta and takes forms corresponding to every form.

S.Sitarama Sastri