What about even the extreme duality of the world outside of Church from Sunday afternoon through Saturday night, and how confusing that is to kids? I went to a Christian school for a good bit of my childhood, and things were no different. Todd Snider sang it well in "The Ballad of the Kingsmen"

First grade where they teach the kid pride

They tell him he'll need to thrive,

In a world where only the strong will survive,

So he's taught the art of more,

To compare to and to keep score Monday thru Friday while,

He stares at the floor til' Sunday they make him go to school once more,

Only this time they make him wear a suit and a tie,

And listen to some guy who claims to know where people go when they die,

Tell him that only the meek are gonna inherit the earth,

Well shit, by this time the kid doesn't know what anything is worth