What is the dream and sleeping?
First of all one should distinguish the term dream and sleep. Sleep is the passive process of human activity that is represented through calm state of the body and mind. Sleep is a special form of everyday rest which is necessary for everyone. Person, who hasn't slept at all or hasn't slept well, feels depressed, frustrated and helpless both physically and psychically. There are a number of theories about what is sleep and dreams, about their nature and meaning, but all these theories have one common feature: they all insist on importance of sleep as the process of recovery both body and mind. There is even special time detected when one should go to bed. If one miss that time and went to bed later, according to researches of scientists, he will have no rest. The body will be sleeping but the brain will continue its activity and so the general state of person will be unsatisfied in the morning.
Unlike the sleep dreams are mostly psychological process of human. Sure, dreams may come only in case if person is sleeping, and they are the part of the physical process, but by the nature of the dreams they in no case may be considered as physical process. The specialists that explored the phenomena of dreams haven't come to single conclusion, some specialists states that dreams is simply the result of our imagination, other states that those are the message from our subconsciousness, the third specialists states that dreams are the indicator of our emotional and psychical state.
There are also those who believe that dreams are the phenomena of supernatural activity. Those people believe that dreams are the reflection of our lives we lived before or of those lives we will live. There are also specialists-mystics that believe that dreams is a connection to alternative worlds, and that by means of dreams our dead ancestors or friends communicate with us. Such theory may explain why sometimes in our dreams we see dead people whom we cared about much. Sometimes, in dreams like that they ask for something or warn us about the danger that may happen.
One way or another, dreams do exist, and we see them from night by night. There those who state that they see no dreams, but those are people who simply can't recollect the dream they saw as they wake up in the morning. So, we have described for you the theories about dreams and their nature. There are a lot of arguments to support any of these theories but there is no single argument to disprove at least one of them, and if so all of these theories have a right for existence and one should decide himself which one true or false. As for sleep everything is clear – sleep is a physical process that is necessary to recover physical and psychical strengths of person.