Every man finds himself at list ones a day in a sleep position
and even that we probobly don't know alot about sleeping and dreaming and thair jobs - we know that one of the purposes of the sleeping in fisical way is to do metabolism and to clean the body, just like cleaning the office in the evning after the workers go home...
In the spiritual way ther is also kind of cleaning ,....... and on this section response this part of the sleeping that calls dreaming .