2 Corinthians 4:15-18
4:15 For all these things are for your sake, so that the grace that is including more and more people may cause thanksgiving to increase to the glory of God.
4:16 Therefore we do not despair, but even if our physical body is wearing away, our inner person is being renewed day by day.
4:17 For our momentary, light suffering is producing for us an eternal weight of glory far beyond all comparison
4:18 because we are not looking at what can be seen but at what cannot be seen. For what can be seen is temporary, but what cannot be seen is eternal.