I watched the movie The Others recently, and I was blown away by the ending and the story. I was thinking about this plot element which didn't make much sense to me. It's about the return of the husband of Nicole Kidman's character. I am assuming that plot element employed by the director is that The husband's spirit, after his death, was looking for a way to reach his family, and he even says that dialogue implying that he was searching for their house for a long time in the fog.
What I really don't understand is if his spirit wanted to be with his family, why does he leave them? I am assuming that during his confused state he understands that his family also died like he did, why did he not stay with them? Does his spirit have any other purpose which was not implied in the movie? Can anyone clarify this aspect for me?