My enemy - I shall refer to him as B. - entered my life about twenty years ago. At that time I had only a very vague idea of what it meant to be someone's enemy; still less did I realise what it was to have an enemy. One has to mature gradually towards one's enemy as towards one's best friend.1930s Germany; the shadow of Nazism looms. Pictures of the new dictator, 'B.', fill magazines and newspape...