What does the Bible say about affliction and adversity?

In Isaiah 30:20-21, the Lord acknowledges that He may provide the 'bread of adversity and the water of affliction' as a means of spiritual nourishment. This suggests that trials are intended to draw us closer to God and bring us to a deeper understanding of His will. Instead of leading us away from Him, afflictions are often used to strengthen our faith, refine our character, and teach us reliance on His grace. It is essential to recognize that God's purpose in our difficult times is ultimately for our good and spiritual growth.