masters after zurvan , whether i remember them in particular or not , did not have his strength , i 'm convinced of that , but more significantly , they did n't have zurvan 's interest in learning and teaching , and it was this passion of zurvan , to instruct me , this lack of fear of me , of my independence , which influenced the rest of my existence , even during periods when i could not recall anything about zurvan , his sharp blue eyes or his ragged white beard .