My anger about pain has melted mostly for one reason: I have come to know God. He has given me joy and love and happiness and goodness. It leaves me with faith in a Person, a faith so solid that no amount of suffering can erode it.
He has hurt and bled and cried and suffered. He has dignified for all time those who suffer, by sharing their pain. But one day he will gather the armies of heaven and will unleash them against the enemies of God. The world will see one last terrifying moment of suffering before the full victory is ushered in. Then God will create for us a new, incredible world. And pain will be no more. Revelation 19:11-22:6.