John 9

John 9:1-3 As he [Jesus] went along, he saw a man blind from birth.  His disciples asked him, “Rabbi, who sinned, this man or his parents, that he was born blind?”  “Neither this man nor his parents sinned,” said Jesus, “but this happened so that the work of God might be displayed in his life.”

From my Bible’s commentary:

Some of the bad things that happen occur simply because we live in a fallen world.  Negative circumstances occur because creation itself was damaged when sin entered the world, opening the door for illness and natural disaster (see Romans 8:19-22).  In this case, neither the man nor his parents had done anything to deserve his blind birth.  Their suffering came as the result of living in a ruined creation.  Nevertheless, God intended to use their terrible experience to accomplish a greater good.

God receives glory when he miraculously intervenes with his healing power.  But he also receives glory when people endure their suffering through the power of his grace.  In either case, God is glorified as the giver of life in an otherwise futile and destructive world.