। - ॥ ४१६ ॥
In plain words
Burn the whole of it, down to the root, in the fire of Brahman — that undivided reality which is pure Being. Once that fire has finished its work, the greatest of the knowers simply stands there, being nothing else but eternal, spotless awareness and joy.
Close to the Sanskrit
Having burnt this, root and all, in the fire of Brahman — the undifferentiated Self that is Being — thereafter the foremost of knowers abides, of himself, as the very self of eternal, perfectly pure knowledge and bliss.