The parable about the beggar Lazarus and the rich man told in Luke 16, indicates an awareness of each other from both heaven and hell. So much so, that in Luke 16:26 it describes a gulf between the two dimensions to prevent crossing over. Are you aware of the souls in hell if in heaven and vise versa? Will we see ones we could have witnessed to in agony?
I was raised Catholic, but left in my early 20's for a non-denominational Church. I now realize that this was a mistake and I want to come back. I was baptized, received first Communion and Confirmed. Do I have to go to classes or do some special process to return to Mass?