“Such a one (the narcissist – SV) is encased, is he not, in an armour – such an armour! The armour of the crusaders was nothing to it – an armour of arrogance, of pride, of complete self-esteem. This armour, it is in some ways a protection, the arrows, the everyday arrows of life glance off it. But there is this danger; Sometimes a man in armour might not even know he was being attacked. He will be slow to see, slow to hear – slower still to feel.”
“Dead Man’s Mirror” by Agatha Christie in “Hercule Poirot – The Complete Short Stories”, Great Britain, HarperCollins Publishers, 1999