Do you have a dream? Dream, I refer to so called night dream in the context.
All human have dreams. Although some people say that they have no dream, nobody has no dreams. The person who feels have no dreams simply forgot the dream he had.
The etiology of the dream is not clarified completely. Mr. Sigmund Freud, the father of psychoanalysis, believed that the dream was a pathway to reach unconscious. His followers also researched about the dream. Even now, there are lots of books about "Dream Fortune Teller".
In fact, the dream occurs from discharges of neurons in the human brain. Brain activity is influenced by the environment. This is the reason why we tend to have a nightmare when we are sick. Afternoon naps also cause strange dreams.
It is also said that the dream acts as a masturbation. According to this hypothesis, we have a dream about what we cannot gain in the real world. You should be cautious after having a dream of success.
Then, what should you understand after a bad dream, such as killing a neighbor? Is this unconscious desire of yours?
I do not think so.
Killing in a dream is only a symbol. You perhaps are serious about the relationship against the neighbor. It is not to be worried or evil thought.
And after all, it is the most rational thought now that the night dream has no meaning. To begin with, innumerable idea appears in the human brain in every second, most of which are meaningless. Obsessive compulsive disorder (OCD) is a mental disorder that occurs when the meaningless and fearful ideas become dominant. When fragments of the these meaningless ideas gather occasionally in asleep, you may recognize them as a dream. Therefore, the dream is a product of a chance.
More or less, you do not have to worry about the content of a dream. The real matter is in the real world.