What does the Bible say about sickness and suffering for Christians?

Sickness among believers is a part of the fallen world, but it serves a divine purpose according to God's will. In John 11:4, Jesus indicated that Lazarus's illness was for the glory of God, showing that even in suffering, there is a meaningful purpose. Believers are promised that trials and tribulations work together for their ultimate good, refining their faith and drawing them closer to God (Romans 8:28). Therefore, every illness and trial is an opportunity to witness God's grace and power as He sustains and delivers His people.