There is evidence for this but it is all anecdotal. I submit the following true stories which were told to me as additional anecdotal evidence that this may be true.
T***, whose mother died in a car crash when she was a little girl, had two stories to share. First, she told us that her aunt claims that as she was sitting drinking at the kitchen table, her dead sister came and sat across from her and spoke to her. T*** also shared that she had gone to sleep in her parents' bed. She woke up thirsty and asked her father to get her a drink of water. After he left, her mother appeared next to the bed. She screamed, and her father dropped the glass and it broke.
A couple of days ago, a vocabulary discussion in my high school reading class took an unexpected turn. I told the class that after my father died, as I was walking in my mother's yard, I heard something that sounded like someone had breathed into my ear and made the sound, "shooo." This was very similar to a word, soof, that a character says in the novel, So B. It. I told them that I wondered if my father hadn't been trying to say my name (Judy) to try to get my attention. Immediately 4 hands went high into the air and I could tell that they had something they very much wanted to share.
A******** shared a story she has been told about herself. When she was three years old, her mother and grandmother heard her talking to someone in the living room, and when they came in, there was no one there. She told them that she was talking to her great-grandmother, who had recently died.
K*** shared that when he was six years old his natural father died. They were living with his grandparents at the time. His grandmother reported seeing the rocking chair where his dad liked to sit moving on its own, and K*** had an experience of his own in the chair. He felt as though someone put hands on his shoulders and pressed down, as though someone was standing behind him. He is now 14 years old and says that when he visits his grandparents, he feels he is also visiting his father, because he feels his presence there.
M***** shared that when he was a young boy, his grandmother died during the night while he was asleep. The sound of ambulance sirens woke him up. He claims that he saw his grandmother in the living room watching the paramedics wheel her own body out to the ambulance, and that this freaked him out.
T***, whose mother died in a car crash when she was a little girl, had two stories to share. First, she told us that her aunt claims that as she was sitting drinking at the kitchen table, her dead sister came and sat across from her and spoke to her. T*** also shared that she had gone to sleep in her parents' bed. She woke up thirsty and asked her father to get her a drink of water. After he left, her mother appeared next to the bed. She screamed, and her father dropped the glass and it broke.
These stories are anecdotal, of course, not proof of anything, but provide further evidence of the continuation of the life of the spirit after the death of the body. All of the current teenagers (between the ages of 14 and 16) were age 6 or younger when they had their experiences. All of their visions were of a recently passed loved one.
I said to the last two, "I don't understand. Why did you freak out when you saw the person who had died? It was someone you loved. Why weren't you happy to see them?"
They looked at me in a pitying way. In unison they exclaimed, "Because they weren't supposed to be there!"
The image of the rocking chair is from Quality House