2 Corinthians 4:16-18

BBE(i) 16 For which cause we do not give way to weariness; but though our outer man is getting feebler, our inner man is made new day by day. 17 For our present trouble, which is only for a short time, is working out for us a much greater weight of glory; 18 While our minds are not on the things which are seen, but on the things which are not seen: for the things which are seen are for a time; but the things which are not seen are eternal.