This message begins by calling us to rejoice in trials, then shows that we know that trials are a positive part of the Christian life. Their aim under God is to bring us to completeness rather than being left in a position of lacking.

James 1:2-4
English Standard Version
Testing of Your Faith
2 Count it all joy, my brothers,[a] 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.