। ॥ ७६ ॥
In plain words
This, right here, is that one cause: nothing in it set apart from anything else, pure consciousness and nothing besides. And from that — Being of a single form, taken together with māyā — this whole universe came to be.
Close to the Sanskrit
That, this, is the one cause — devoid of distinction, of the nature of pure consciousness. From that, whose single form is Being, associated with māyā, arose this universe.