The arm repeats the same words Audrey said to Charlie when she freaks out and doesn't know who she is anymore. Why? Is this a key to everything?
Cooper seems to understand and is able to open the portal into Glastonbury Grove, not being stopped by the Arm's doppelganger this time.
because this time there is no doppelgänger out there
This drives me nuts. I feel like we are talking about archetypes but it's difficult for me to pin down a theory relating this to the TP story. Is DL maybe just asking us to examine what the story is about?
Also it always reminds me of one of my favorite stories, The Ocean at the End of the Lane, by Neil Gaiman, who also deals with archetypes in his work. But I have read a critic call DL "hermetic", which is part of what is so challenging about him.