From the journal of Adelaide Carter:

…there are places on the earth where evil comes through stronger. Perhaps its a thin spot in the veil which separates us from the unseen world. Our job is to remain true to the light that has been revealed to us.

We need have no congress with what is out there. We have instead to stand fast, firm in faith, and keep the wickedness at bay.    

Janet's husband, Gary, was a danger to her and their children. She had to leave him before he physically injured them. If Janet had read her Grandmother Carter's journal she might not have taken refuge in the North Carolina cabin. Intent upon murder, Gary follows them to the cabin where her grandmother's words prove horrifyingly true.