I think Holly could be a personification of the word "holy" and what is holy. Religion as an institution has become misused in the modern world and when Holly says: "Words so long never could save us," she means that our actions will speak louder than whatever words people quote from the Bible. For those who have stuck with a religion for a long time, they may have gone through experiences good and bad that transformed their original beliefs. "She cried and she told us about Jesus" could be saying that people should go back to what they held onto originally instead of bending to the corruption of words and institutions.
This might be stretching it...but:
I think Holly could be a personification of the word "holy" and what is holy. Religion as an institution has become misused in the modern world and when Holly says: "Words so long never could save us," she means that our actions will speak louder than whatever words people quote from the Bible. For those who have stuck with a religion for a long time, they may have gone through experiences good and bad that transformed their original beliefs. "She cried and she told us about Jesus" could be saying that people should go back to what they held onto originally instead of bending to the corruption of words and institutions.