• All propaganda must be confined to a few bare necessities and then must be expressed in a few stereotyped formulas . . . Only constant repetition will finally succeed in imprinting an idea upon the memory of a crowd.

    Adolf Hitler: All propaganda must be confined to a few bare necessities and then must be expressed in a few stereotyped formulas . . . Only constant repetition will finally succeed in imprinting an idea upon the memory of a crowd.