We have not "lost" them, because we know where they are.

"Meanwhile, we on this dying Earth can relax and rejoice for our loved ones who are in the presence of Christ. As the apostle Paul tells us, though we naturally grieve at losing loved ones, we are not "to grieve like the rest of men, who have no hope" (1 Thessalonians 4:13). Our parting is not the end of our relationship, only an interruption. We have not "lost" them, because we know where they are. They are experiencing the joy of Christ's presence in a place so wonderful that Christ called it Paradise. And one day, we're told, in a magnificent reunion, they and we "will be with the Lord forever. Therefore encourage each other with these words" (1 Thessalonians 4:17-18)." ~ Randy Alcorn (from his book "Heaven")