[Vulcan]

Originally Posted by Hessen

“If you tell a lie big enough and keep repeating it, people will eventually come to believe it. The lie can be maintained only for such time as the State can shield the people from the political, economic and/or military consequences of the lie. It thus becomes vitally important for the State to use all of its powers to repress dissent, for the truth is the mortal enemy of the lie, and thus by extension, the truth is the greatest enemy of the State.”

Joseph Goebbels

I like this quote but this says it didn't actually happen.

Goebbels wouldn’t have said that in public. He always maintained that propaganda had to be truthful. That doesn't mean he didn’t lie, but it would be a pretty poor propagandist who publicly proclaimed that he was going to lie. I know of no evidence that he actually said it. I haven’t read everything Goebbels wrote, but I have been through a lot of it.

Goebbels actually accused others of using the technique. In a 1941 article titled “ Churchill’s Lie Factory,” he wrote:

“One should not as a rule reveal one’s secrets, since one does not know if and when one may need them again. The essential English leadership secret does not depend on particular intelligence. Rather, it depends on a remarkably stupid thick-headedness. The English follow the principle that when one lies, one should lie big, and stick to it. They keep up their lies, even at the risk of looking ridiculous.”

http://bytwerk.com/gpa/falsenaziquotations.htm