2. A hundred birds returning to their nests implies that the loss is regained and everything is complete. Dreaming is a normal psychological phenomenon that occurs during sleep. In general, people in the sleep of the brain nerve cells are in a state of inhibition, this inhibition process is sometimes more complete, sometimes not complete.

3, if not completely in the state of inhibition, the cerebral cortex there are a few areas of nerve cells in the excitement, people will dream. The activity of a few cells lost the waking state of the whole cerebral cortex control and regulation, memory of certain fragments of unconstrained active, may be different from the normal psychological activities of the strange dream.