As Hitler wrote in his 1925 autobiography Mein Kampf (James Murphy translation, page 134):
"[I]n the big lie there is always a certain force of credibility; because the broad masses of a nation are always more easily corrupted in the deeper strata of their emotional nature than consciously or voluntarily; and thus in the primitive simplicity of their minds they more readily fall victims to the big lie than the small lie, since they themselves often tell small lies in little matters but would be ashamed to resort to large-scale falsehoods. It would never come into their heads to fabricate colossal untruths, and they would not believe that others could have the impudence to distort the truth so infamously. Even though the facts which prove this to be so may be brought clearly to their minds, they will still doubt and waver and will continue to think that there may be some other explanation. For the grossly impudent lie always leaves traces behind it, even after it has been nailed down, a fact which is known to all expert liars in this world and to all who conspire together in the art of lying. These people know only too well how to use falsehood for the basest purposes."
The Big Lie technique was made possible by the onset of modern mass media in the early 20th century, particularly radio and motion pictures, but also billboards, and high-speed printing and distribution for magazines and newspapers. With modern mass media, the psychological effect of the Big Lie on large numbers of people was tremendous.
Thus, Joseph Goebbels, the Nazi Propaganda Minister, greatly refined the technique using mass media in the 1930s. Goebbels wrote:
“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.”