US-P10.013ab ।US-P10.013cd ॥
In plain words
Like someone in deep sleep, who sees no duality while awake, yet sees it only as non-duality; who remains actionless even while performing actions—he is the knower of the Self, and no other person is. This is the settled truth here.
Close to the Sanskrit
Like in deep sleep, while waking who does not see duality, but seeing even through non-duality; and similarly even while acting, actionless who is—he is the knower of the Self, not another, this is the certainty here.