Kaṭha Upaniṣad 222

222

tathānyo dṛṣṭāntaḥ -- vāyur yathaika ity ādi / prāṇātmanā deheṣv anupraviṣṭo, rūpaṃ rūpaṃ pratirūpo babhūvety ādi samānam ///2,2.10 //

Shankara’s Commentary:
Com.— So, another illustration (is offered by ‘as wind though one’, etc.). The analogy is complete, as he enters all bodies as pratta and takes forms corresponding to every form.