At this time, another subconscious self of a dreamer who is related to himself in future reality appears as an ancestor and warns or prophesies. For example, the dream of parents standing in the oxygen and complaining that oxygen is not good is not a real soul, but another self of a dreamer appears as a parent and tells them. However, in many other cases, it can be seen as a precognitive and timely dream that tells us what will happen in the future of our spirits in the future.