This is how the interpretative community works, and I love it.

So U2 write a song called "Beautiful Day." Someone hears it, connects it with a passage in the Bible, and preaches on it. Their sermon appears in a book.

And then someone considers "Beautiful Day" wearing the lenses from having read that sermon, and uses it in constructing another, totally different sermon.

And then someone who heard that sermon will themselves go back to the song wearing those lenses.... and the cycle continues.

This is so much better than the futile quest for the mythical "real meaning" of a U2 lyric.