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able achievements activity already ancient appreciate Arabic artists beauty become begin better cause century Christians civilization clear compared complete consider considerable continue course created culture direction discoveries East efforts Egyptian essential example experience experimental explain fact finally genius give Greek hand history of science human humanists ideas ignorance important increase intellectual interest kind knowledge language later Latin learned least less lives man's mankind material mathematical means ment method mind Muslim nature never obtain past perhaps point of view possible present progress purely reach realize relatively remain scientific scientists sense simply single soon speak spirit struggle sufficiently sure teach technical things thought tion translated true truth understand universe West whole