"Thinking about it day and night", you watch too much news and get in touch with yourself. Actually, it's nothing
The duke of Zhou explained that he dreamed of his father's death:
Dreaming of his father's death is a good omen, which indicates that his father will be in good health.
Psychological explanation of dreams: Dreams are spontaneous psychological activities at a certain stage of human consciousness during sleep. In this kind of psychological activity, the whole process of individual physical and mental changes is called dreaming. Dreams are only the image activities of deep cells in the cerebral cortex during sleep due to internal and external stimuli, which have no practical significance.