This is rather interesting: the New Scientist reports that Christianity (or maybe religion in general) can
change the way you see the world. I mean literally, as in 'causing minor alterations to visual perception'; oddly enough, it seems to make you better at noticing embedded patterns. They suggest it may have something to do with the particpants' faith encouraging inwardness.
The really mind-boggling thing about this, though, is that the Dutch team were using neo-calvinists (Calvinists? Visual imagery? Shurely shome mishtake?) It is, of course, a very small scale survey, but I'd be fascinated to see the Catholic follow-up that's planned...