If he had smiled why would he have smiled? To reflect that each one who enters imagines himself to be the first to enter whereas he is always the last term of a preceding series even if the first term of a succeeding one, each imagining himself to be first, last, only and alone whereas he is neither first nor last nor only nor alone in a series originating in and repeated to infinity.
Yes, this Purusha consciousness must be maintained; otherwise the calm will not last. The knocks and blows that come from outside cannot disturb one, if this Purusha consciousness remains at the back.