God uses testing to reveal what is in the heart (Genesis 22:1–24; Job 1:1–22). Undergoing a fiery trial
will demonstrate whether you are a precious metal (gold, silver) or simply straw, that is, whether you are genuinely a Christian or not. The manner of the testing may vary from person to person (and even civilization to civilization) but the reality of testing is universal.
12 Beloved, do not be surprised at the fiery trial when it comes upon you to test you, as though something strange were happening to you.