Examples of Goebbels’ insights include the following:

“There was no point in seeking to convert the intellectuals. For intellectuals would never be converted and would anyway always yield to the stronger, and this will always be “the man in the street.” Arguments must therefore be crude, clear and forcible, and appeal to emotions and instincts, not the intellect. Truth was unimportant and entirely subordinate to tactics and psychology.”

“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.”

https://www.theburningplatform.com/2022/03/09/propaganda-corporatism-and-the-hidden-global-coup/