Quite heavy stuff to end the chapter on, eh? Well, the next chapter starts a little heavier but gets lighter after that. Just an FYI.
I could have gone on with Dad's explanation, but that would get long and I don't want to sound like I'm preaching. (Especially since I know there are readers out there who don't hold the same world views as I do.) Trying to find a balance between the importance of religion in Mary's life and making this work accessible to a wide audience is a little tricky. I'll just leave it at Mary's question about the existence of God gets answered in a satisfactory manner.