What happens when we dream?

Dreaming can be defined as a way of live every one of us have in the invisible world. We can define the invisible world as the SPIRIT WORLD.
In the SPIRIT WORLD we are shadows and have a way of living as spirits in a sort of a parallel world connected to us only through the process of dreaming.
Every night when we go to bed our shadows travel through the wall of time and space and enter the invisible world in we continue working on the specific task or mission assigned to each one of us that we have to accomplish. As shadows we process different way of communication, and is our responsibility to find a way to understand both languages because both worlds interwoven in us during our time in the physical world.
Sometimes we are able to remember some portion of our dreams that probably do not make sense if we try to give them an interpretation considering only the physical reality in which we live during daytime when we are awake. But if we understand  how the INVISIBLE WORLD works then we are able to understand both worlds it gives us a different perspective of REALITY of the universe in which we live on.
We receive from the sun, during daytime, enough energy making the human body able to continue  working during night time. Everything that our brain processes during daytime is recorded, like the way  the cell phone device do when we use them.
When we sleep, our senses stop working in the tasks pertaining to the physical reality and the brain starts to process information pertaining to the invisible reality in which our shadows live and the images and activities are totally different that the ones belonging to the real world.
To many of us, when something is perceived from the invisible world during daytime, our brain processes the information obtained from both worlds, and if we are not aware of the interwoven of information, easily we fall in a deep state of FEAR trying to cope with the emotional reaction of the physical body.
To maintain a healthy communication between the two worlds it is necessary to be fully aware of the rules that govern each world. The lack of understanding how it works can lead to a serious case of mental illness that sometimes leads to suicidal states.