। ॥ ९१ ॥
In plain words
A corpse's body and senses feel nothing when fire touches them. So if the breath is what knows — does it even notice, while the person is asleep, a thief creeping in?
Close to the Sanskrit
Since the body-and-sense-group of a dead [person] does not know the pain born of burning — if the life-breath is the knower, does it know, during sleep, a thief's molestation?