Jack,
Hi, nice to meet you!
In addition to the comments above about Witness indoctrination, many, many people here are convinced there is no God of any sort.
You see the problem? No God --> no afterlife---> no experiences.
It is the rare person who believes in no spirit life whatsoever but believes in an after life for humans.
Einstein had a theory, not developed, before his death that all time exists at the same time.
One way it was explained is time being like a river. People are entering and exiting the river up and down it all the time. While you are on the river, you are only aware of yourself and those you come upon. Others who are days behind you or days ahead of you are on the same river at the exact time you are however.
Now this theory, if one believes in God or spirits could help explain some things...like foretelling the future and the past (divination/prophecy) and it could also explain attempts at communication I guess.
The continuum in which time flows, is measured, and exists is relative to what is known at the time a person lives.
Some people are satisfied with the world as it is known and explained in their lifetime. Others question and seek the parameters - it sounds like you are one of the latter perhaps?