"She carries a pearl in perfect condition" -- Matt 13:45-46 "The kingdom of heaven is like a merchant looking for fine pearls. When he found one of great value, he went away and sold everything he had and bought it."
"What left a mark no longer stains" -- Not a quote, but a pretty clear allusion to Isaiah 1:18 "Though your sins are like scarlet, they shall be as white as snow."
"We've found different ways of expressing it, and recognized the power of the media to manipulate such signs. Maybe we just have to sort of draw our fish in the sand. It's there for people who are interested. It shouldn't be there for people who aren't." -- Bono on faith, quoted in U2 at the End of the World