"Eyewitnesses report that upon reaching the center of Bukhara, Genghis Khan rode up to the large mosque and asked if, since it was the largest building in the city, it was the home of the sultan. When informed that it was the house of God, not the sultan, he said nothing. For the Mongols, the one God was the Eternal Blue Sky that stretched from horizon to horizon in all directions. God presided over the whole earth; he could not be cooped up in a house of stone like a prisoner or a caged animal, nor as the city people claimed, could his words be captured and confined inside the covers of a book. In his own experience, Genghis Khan had often felt the presence and heard the voice of God speaking directly to him in the vast open air of the mountains in his homeland, and by following those words, he had become the conqueror of great cities and huge nations."An excerpt from a book I've started reading - Genghis Khan and the Making of the Modern World, by Jack Weatherford. Quite interesting so far.