"...the activities of propaganda had always been of extremely great interest to me. In it I saw an instrument which just the Socialist-Marxist organizations mastered and knew how to apply with expert skill."

"The great masses' receptive ability is only very limited, their understanding is small, but their forgetfulness is great. As a consequence of these facts, all effective propaganda has to limit itself only to a very few points and to use them like slogans until even the very last man is able to imagine what is intended by such a word. As soon as one sacrifices this basic principle and tries to become versatile, the effect will fritter away, as the masses are neither able to digest the material offered nor to retain it. Thus the result is weakened and finally eliminated."

— Adolf Hitler, War Propaganda, Chapter VI of Mein Kampf