The porous self is open to the divine as well as to the demonic, while the buffered self is closed to both alike. Those who must guard against capture by fairies are necessarily and by the same token receptive to mystical experiences. The ‘showings’ manifested to Julian of Norwich depend upon exceptional sensitivity, which is to say porosity — vulnerability to incursions of the supernatural. The portals of the self cannot be closed on one side only.

— Alan Jacobs, some enchanted evening, The Homebound Symphony (via)