Pope Shenouda III
The saints who departed are still living  The Lord explained this fact when He  said: "...have you not read what was spoken to you by God, saying, 'I  am the God of Abraham, the God of   Isaac, and the God of   Jacob'? God is  not the God of the dead, but of the living" (Matt.22: 31,32).  Therefore those saints are still living. Why should we consider them  dead and not ask their prayers?
  We should not forget as well the  appearance of  Moses and Elijah with the  Lord Jesus Christ on the Mount  of Transfiguration.  Moses   died fourteen centuries before the birth of  Christ and is still  living  just as  Elijah who was taken up to heaven. Their souls did not  die;  they are in  Paradise and they see more than we  do.