"I believe in ... the communion of saints." This statement, pulled from the Apostles' Creed, means two things to me currently: (1) Believers are to be one, and (2) When believers die, they are not wholly lost to us.
Love necessitates prayers for or to or about the dead. And if we close off such an important part of our life from Him, how are we to be honest with God? Or do we simply die piecemeal with those we love, as they die?
"Of course I pray for the dead ... At our age, the majority of those we love best are dead. What sort of intercourse with God could I have if what I love best were unmentionable to him?" (C.S. Lewis, Letters to Malcolm, 107).