। ॥ १६७ ॥
In plain words
"All this has That for its self; That is what is real" — so the śruti speaks. And in saying it, it states plainly that this Being, the cause of the whole world, is eternal.
Close to the Sanskrit
"All this has this as its self; that is the real" — and thus the śruti clearly declares the eternality of this very Being, the cause of the world.