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.
Sri AurobindoA quiet mind does not mean that there will be no thoughts or mental movements at all, but that these will be on the surface, and you will feel your true being within, separate from them, observing but not carried away
Sri Aurobindo