James 1:2-4 - testing of faith produces steadfastness

Count it all joy, my brothers, when you meet trials of various kinds, 3. for you know that the testing of your faith produces steadfastness. 4. And let steadfastness have its full effect, that you may be perfect and complete, lacking in nothing.

Lamentations 3:31-32 - The Lord will not cast off for ever

For the Lord will not cast off forever, 32. but, though he cause grief, he will have compassion according to the abundance of his steadfast love;