Hitler was one to know this. Unfortunately history has proven time and time again that when many people repeat a lie enough times it becomes manifested as truth. Most people accept what the government tells them at face value, but you've also got to remember that famous quotable by Abraham Lincoln You can fool all of the people some of the time, and some of the people all of the time, but you can not fool all of the people all of the time. A lie of epic proportions usually becomes unbound and that was a lesson Hitler eventually had to learn.