“Make the lie big, make it simple, keep saying it, and eventually they will believe it.” – Adolf Hitler
Edit: Found some other interesting ones:
“Why of course the people don’t want war. Why should some poor slob on a farm want to risk his life in a war when the best he can get out of it is to come back to his farm in one piece? Naturally the common people don’t want war neither in Russia, nor in England, nor for that matter in Germany. That is understood. But, after all, it is the leaders of the country who determine the policy and it is always a simple matter to drag the people along, whether it is a democracy, or a fascist dictatorship, or a parliament, or a communist dictatorship. Voice or no voice, the people can always be brought to the bidding of the leaders. That is easy. All you have to do is tell them they are being attacked, and denounce the peacemakers for lack of patriotism and exposing the country to danger. It works the same in any country.” – Hermann Goering
The size of the lie is a definite factor in causing it to be believed, for the vast masses of the nation are in the depths of their hearts more easily deceived than they are consciously and intentionally bad. The primitive simplicity of their minds renders them a more easy prey to a big lie than a small one, for they themselves often tell little lies but would be ashamed to tell a big one.–Adolf Hitler, Mein Kampf
“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 becomes the greatest enemy of the State.” -Josph Goebbels, Nazi propaganda minister