The Lion Isaiahists and the Wolf Isaiahists both preached on street corners, battling when they met: they were at odds over whether it was the lion or the wolf that would lie down with the lamb once the Peaceable Kingdom had arrived.
This little satirical gem from Margaret Atwood’s The Year of the Flood puts it finger rather squarely on one of the problems Christianity tends to suffer from.
There’s much insight in the following thought, too:
… religion is a shadow of God. But the shadows of God are not God.