"Without some form of censorship, propaganda in the strict sense of the word is impossible. In order to conduct a propaganda there must be some barrier between the public and the event. Access to the real environment must be limited, before anyone can create a pseudo-environment that he thinks wise or desirable. ...It is often very illuminating, therefore, to ask yourself how you got at the facts on which you base your opinion. Who actually saw, heard, felt, counted, named the thing, about which you have an opinion? Was it the man who told you, or the man who told him, or someone still further removed? And how much was he permitted to see?"