James 1:2-4 (NIV):

"Consider it pure joy, my brothers and sisters, whenever you face trials of many kinds because you know that the testing of your faith produces perseverance. Let perseverance finish its work so that you may be mature and complete, not lacking anything."

1 Peter 1:6-7 (NIV):

"In all this you greatly rejoice, though now for a little while you may have had to suffer grief in all kinds of trials. These have come so that the proven genuineness of your faith—of greater worth than gold, which perishes even though refined by fire—may result in praise, glory and honor when Jesus Christ is revealed."

Hebrews 11:1 (NIV):

"Now faith is confidence in what we hope for and assurance about what we do not see."

2 Corinthians 4:17-18 (NIV):

"For our light and momentary troubles are achieving for us an eternal glory that far outweighs them all. So we fix our eyes not on what is seen, but on what is unseen, since what is seen is temporary, but what is unseen is eternal."

Romans 5:3-5 (NIV):

"Not only so, but we also glory in our sufferings, because we know that suffering produces perseverance; perseverance, character; and character, hope. And hope does not put us to shame, because God’s love has been poured out into our hearts through the Holy Spirit, who has been given to us."