How Could a Loving God Allow His Children to Die?

This question has always plagued mankind. It seems incongruous that a loving father would ever permit his child to perish, much less a Holy Father, His child. The primary fact to take into consideration when anyone dies, who is "in Christ" and especially a child, is that they must leave a temporary "testing ground" in order to enter into a permanent state of peace and joy. They in effect, "go to their reward." They give up the transient for the permanent. They leave temptation behind. They inherit eternal life. They are comforted in a way that we who are still bound to this physical earth can not understand.