Secrecy is the keystone to all tyranny. Not force, but secrecy and censorship. When any government or church for that matter, undertakes to say to its subjects, "this you must not read, this you are forbidden to know," the end result is tyranny and oppression, no matter how holy the motives. Mighty little force is needed to control a man who has been hoodwinked in this fashion; contrariwise, no amount if force can control a free man, whose mind is free. No, not the rack, nor the atomic bomb, not anything. You can't conquer a free man; the worst you can do is kill him.Robert A Heinlein