"What each man does is based not on direct and certain knowledge, but on pictures made by himself or given to him...The very men who most loudly proclaim their “materialism” and their contempt for “ideologues,” the Marxian communists, place their entire hope on what? On the formation by propaganda of a class-conscious group. But what is propaganda, if not the effort to alter the picture to which men respond, to substitute one social pattern for another?"