
Continuity mistake: After Chris is dead, and his wife is writing in her diary, and she writes "I still exist" as she's writing it, exist is written "EXST", then when she looks to read what she wrote it reads "EXT". The writing's different too. (00:22:10)
Answer: It's open to interpretation, but one theory might be that Chris' faith and his assumptions about the Afterlife have been completely "upended." And as Annie has lost her faith altogether, he must now struggle to bring her back into the fold and set things right so that they can be together.
Jean G