The voice’s question, “Who do you say that I am?” is yet another reference to the Bible: Matthew 16:15. In the Bible, the speaker is Jesus, asking for confirmation of faith from his followers. So, too, does the voice ask Allie to believe in it. But the fact that Allie is so constantly uncertain about the voice’s true identity is emblematic of the fact that she is simply using it as an excuse to believe that she is following God, rather than possessing true faith.