Roberts in his book the Shorter History of the World, also went into battle with the conviction that they were fighting for God and “that death on the battlefield against the infidel would be followed by entry to paradise ” in heaven.
Roberts dalam bukunya Shorter History of the World, juga pergi berperang dengan keyakinan bahwa mereka berperang demi Allah dan ” bahwa setelah kematian di medan perang melawan orang kafir, seseorang akan masuk ke dalam firdaus ” di surga.