Make the lie big, make it simple, keep saying it, and eventually they will believe it.
His primary rules were: never allow the public to cool off; never admit a fault or wrong; never concede that there may be some good in your enemy; never leave room for alternatives; never accept blame; concentrate on one enemy at a time and blame him for everything that goes wrong; people will believe a big lie sooner than a little one; and if you repeat it frequently enough people will sooner or later believe it.
When you lie down with dogs, you get up with fleas.
Though miles may lie between us, we're never far apart, for friendship doesn't count the miles, it's measured by the heart.