। ॥ ४ ॥
In plain words
The impersonation act of reflected Bodha — reflected awareness — runs only in waking and in dream. In deep sleep, when the reflection dissolves, pure Bodha — pure Consciousness — lights up the blankness.
Close to the Sanskrit
Only in waking and dream is there the mimicry of reflected Bodha — reflected awareness. But in deep sleep, when that has dissolved, pure Bodha — pure Consciousness — illumines inertness.