The most effective way to close down the human mind and to manipulate its sense of self is to program into it some form of dogma. A dogma will always vehemently defend itself from other information and repel any alternative opinion which contradicts its narrow, solidified view. Dogmas become a person's sense of security and means of retaining power, and humanity tends to cling to both until its knuckles turn white. Dogmas take endless forms, and when you can persuade different people to hold opposing dogmas, the manipulation of conflict and control through "divide and rule" becomes easy.