। ॥
In plain words
You are within the host of creatures and outside it too, O very I of him who put an end to Death. For those whose thought of you flows unbroken, you spread out your greatness without end.
Word for word
Inside also, outside also, you, of the host of beings, O I-ness of the ender of the ender, for those having a continuity of thought, constantly too you extend the greatness.