Candy
It's simple, really. To get people to shatter the way they think you've got to go by way of pain. Suffering, you know. But there's so much more to it than that. People, they change their philosophies, dogmas, religions and everything all based around bad things that happen that everybody knows could happen any time. But because they don't think they could happen to them nothing changes and the plan stays the same. Pain's the only way to kill the plan.
And I'm not going to say that it's not fun to watch. It is. But there's SO much more TO it.
...or maybe you meant something different. Maybe you get the idea but not the why of the thing.
WOW OH MY GOD LOOK AT THAT. SO MANY COHESIVE SENTENCES. Candy, Candy, look what you do to me.