And so it was entirely in keeping with her own upbringing that my grandmother passed on her knowledge to her children and later to her grandchildren.
Before this point, it seems the narrator took his grandmother's knowledge of society, religion, and monsters as serious as he would take a known placebo. Now that his grandmother's warnings of vampires appear real, can we assume her knowledge of all else might not be so intellectually lacking as th narrator would have originally believed? Most specifically, God?
