What does the Bible say about sickness in believers?

Sickness among believers is addressed in Scripture as a universal consequence of living in a fallen world, yet it signifies not God's rejection but His fatherly love. For instance, in John 11:3-4, when Martha and Mary appeal to Jesus regarding their sick brother Lazarus, they refer to him as 'he whom thou lovest.' This appeal reflects the understanding that despite their suffering, they are under the care of a loving God who is aware of their plight. Believers can find solace in the truth that sickness may in fact serve a divine purpose, such as drawing them closer to God and manifesting His glory, as seen in 2 Corinthians 12:9 and Romans 8:28, which assure that all things, including affliction, work for good.