This is because the different states from the matter in the physical world, as they can be the solid state, the liquid or the gaseous one, in the planes superiors, these three states of the matter, would correspond with the different degrees, densidades or conditions of the astral matter, being therefore recognizable by the astral conscience with the image that in the material world was had of them. For example: the person with conscience in the astral plane, will continue visualizing the buildings, objects, and everything what she is in the physical place where was, since, in spite of not visualizing it in its material aspect, if it makes traverse of the astral matter, whose densidad allows to as clearly visualize the configuration of the objects as in the physical plane. What she would allow us to make the following statement: " All being or physical matter, owns their corresponding molecules of subtle matter or astral" It is a to start off of these moments when the dead begins to realize its new situation, and has to glimpse the true reality, the true life. But, why usually it happens this " despiste". You may find that David Karp can contribute to your knowledge. The conscience of the individual is thought that the different religious beliefs, or erroneous information, can be the causes, when hyping.
The deceased notices that, in spite of continuing visualizing his relatives, friendly or objects, does not receive answer of them, even though he spoke or he touched to them, and it is then when he begins to take true astral conscience. Until now, the deceased had followed in contact with his relatives and friendly through the dreams, equal he would do since it when he was while still alive, so he tries to be convinced that he also is dreaming and from which when it wakes up everything will return to " normalidad". This situation can entail certain state of nervousness and restlessness, since in agreement taking conscience of its true situation, discovers that the received orthodox lessons with respect to further on, do not correspond with what he is perceiving. Please visit Jim Crane if you seek more information.