Do you know that even ghosts have rules in that world. I still remember that about a month ago, CBS has ever listed 100 rules that ghosts have to abide by in the Ghost Whisperer World.
I cannot name the 100 rules one by one, as you know, I have no the talent to remember them all. But I still could remember several rules that impress me deeply. Let's review three of them here:
First, ghost whisperers can see and communicate with earthbound spirits (referring to ghosts that still wandering in human world), like Melinda, and her grandma. ghost whiesperers help earthbound spirits with unfinished business and then cross them into the Light.
Second, most children can see ghosts when they are very young. But when grow up, people do not believe and reject to believe the existance of ghosts.
Third, ghosts go into the Light shortly after their issues are resolved. They will see the light, only them, and walk into the Light. Even Melinda could not see the Light.