The tone and feeling with which these simple assertions are made and accepted, especially if they are constantly repeated, may give them great persuasive value. This point is stressed in Hitler’s discussions of propaganda in Mein Kampf: “Any effective propaganda must be confined to a very few points, and must use these as slogans until the very last man cannot help knowing what is meant.… Propaganda must limit itself to saying very little, and this little it must keep forever repeating.…”
