A first-person narrator is usually a character in the very story he is telling. For that reason, he can only tell the audience the things he knows, which can be limited or erroneous, or his assumptions, which can be quite biased. ... They lack impartiality since the story being told is influenced by their feelings
Answer: I think it means that he was separated from his wife. I'm a Harry Potter fan so I think that's right.
Hope that helped! :)
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