I don't think there too much of God's word revealed in Catholic art...You guys claim that people can and do come to Jesus just by looking at your stained glass windows...
I have yet to see a picture depicting a sinner being born again, at least to the point where a person could look at the picture and 'get it'...
Fact is, the pictures are useless aids to worship unless there is someone there explaining the pictures as they are seen...And if you are capable of explaining the pictures, you're cabable of explaining the gospel, the scriptures...
God says the power is in his words, not pictures...