। ॥ १३ ॥
In plain words
I am the very Rūpa that witnesses Indra and all the rest — unmoving, eternal. My Svarūpa is nothing less than the Witness of everything there is: I alone am I, imperishable.
Close to the Sanskrit
Of the Rūpa of the Witness of Indra and the rest am I; unmoving and eternal. Of the Svarūpa of the Witness of all am I; I alone am I, the imperishable.