Actually, you're right, Yla. Most people outside church circles don't know this, but there is a very specific interpretation of Jesus' words that is common among the faithful. To them, Jesus is making a double-meaning statement. When he says "render unto Caesar what is Caesar's and unto God what is God's," supposedly he is saying exactly what he means while phrasing it in a manner for which the Roman Centurions listening will not arrest him.
To a True Believer, what is "Caesar's?" (ie the government's?) Nothing. And what is "God's?" Everything. they interpret it to be extremely subversive on the subject of taxes. It's this interpretation that led to the whole "churches-aren't-taxed" thing in the first place.
(Edit to remove that embarrassing dangling participle....)