'Testing' in the Bible

And it is my prayer that your love may be more and more accompanied by clear knowledge and keen perception, for testing things that differ,

Be assured that the testing of your faith leads to power of endurance.

The sorrow comes in order that the testing of your faith--being more precious than that of gold, which perishes and yet is proved by fire--may be found to result in praise and glory and honour at the re-appearing of Jesus Christ.