। ॥ ४५८ ॥
In plain words
In just the same way, resting in the supreme Brahman as pure Being itself, he sees nothing apart from That. All that's left of something seen in a dream is a faint memory — and that is exactly how it is, for the one who knows, with eating, with excreting, with everything else the body still does.
Close to the Sanskrit
In the same way, abiding in the supreme Brahman as the very Self of Being, he sees nothing else. Just as [there remains only] a memory with regard to an object seen in a dream, so it is for the knower with regard to eating, excreting, and so on.