2 Corinthians 4:17

4:17 For our momentary, light suffering is producing for us an eternal weight of glory far beyond all comparison

Hebrews 12:10-11

12:10 For they disciplined us for a little while as seemed good to them, but he does so for our benefit, that we may share his holiness. 12:11 Now all discipline seems painful at the time, not joyful. But later it produces the fruit of peace and righteousness for those trained by it.