American Industrial Revolution
I think he meant that to be successful is to try without which implies that every time you wake up you do not think or wish about being successful it just happens without any second thought.
The Umayyads were unable to conquer the nascent Christian Kingdoms in the North which included but were not limited to: Leon, Castille, the Basque Territories, and the Catalonian Counties. In addition, the Umayyads were not able to prevent the fragmentation of their territory into the Taifa Kingdoms in 1038.
350,000 .they used as troops.