II Corinthians 4:16-18

¹⁶Therefore we do not lose heart, but though our outer man is decaying, yet our inner man is being renewed day by day. ¹⁷For momentary, light affliction is producing for us an eternal weight of glory far beyond all comparison, ¹⁸while we look not at the things which are seen, but at the things which are not seen; for the things which are seen are temporal, but the things which are not seen are eternal.