"To the monk who has dared to contradict a fellow monk with such words as "It is not as you say," there is a heavy penalty: "an imposition of silence or fifty blows." The high walls that hedged about the mental life of the monks--the imposition of silence, the prohibition of questioning, the punishing of debate with slaps or blows of the whip--were all meant to affirm unambiguously that these pious communities were the opposite of the philosophical academies of Greece or Rome, places that had thrived upon the spirit of contradiction and cultivated a restless, wide-ranging curiosity."