Mental slavery is the worst form of slavery. It gives you the illusion of freedom, makes you trust, love and defend your oppressor while making an enemy of those who are trying to free you and open your eyes.
In order to rally people, governments need enemies.
They want us to be afraid, so we will rally behind them.
And if they do not have a real enemy, they will invent one in order to mobilize us.
Knowledge makes a man unfit to be a slave.