Qur'an 39: 42 ...... Surely there are signs in this for those who think.

"It is Allah Who recalls the souls of men upon their death, and of the living during their sleep. He withholds the souls of those on whom He has passed the decree of death, and restores the rest till an appointed term. Surely there are signs in this for those who think." Qur'an 39: 42.

The verse requires us to think harder on the sleep status of men. There are two kinds of dreams that men do experience during the sleep. i) Normal dreams, that have to do with their conscious or subconscious minds. ii) Virtual reality dreams, having far greater impact that have to do with their souls. In these instances, the souls do travel beyond to a different plane of existence and visit a different time frame. These souls with newer but similar bodies, do actively participate in the ongoing activities like a living member of that strange community. The community that have peoples of known and unknown faces. During such encounters, we do feel as if some one has instantaneously dropped us there to participate and experience the pangs and joys of those extended moments of that secondary life. Abruptly, our Souls are recalled or plucked up and returned back to the sleeping bodies with the vivid memories of the astral travel, but they soon fade away. We resume our daily routines as if our soul had not left this planet earth. One who has not read the above verses could not possibly understand such nightly encounters - the "tastes of deaths" and the lives on a different plane, akin to "Resurrection". One would simply dismiss them as joyful or frightening and unpleasant dreams - the nightmares. The intuition of a Righteous Believer may find a sublime hint or advice within such encounters.

source

http://www.mostmerciful.com/from-the-fear-of-allah-to-friendship.htm