Psychology NOT religion

[Kamog]

That is refering to a story in which there are prisoners chained up inside a dark cave. They are in a position in which they can only see shadows on the wall when some people from the outside walk past, carrying treasures. One day, one of the prisoners breaks free and sees the outside world for the first time. When he returns to the cave to tell the other prisoners, they think he's crazy.

... or something like that.