How do we know that trials are good for Christians?

Trials are understood to be beneficial for Christians as they serve to test the genuineness of our faith. In 1 Peter 1:6-7, we read that the trial of our faith is more precious than gold, which, when tested by fire, can perish. This indicates that through trials, believers not only demonstrate their faith but are also refined like gold, coming forth stronger and more reliant on God. Such experiences help Christians recognize their utter dependence on God's grace, as highlighted in 2 Corinthians 12:9, where Paul learns that God's grace is sufficient in weakness.