“The Bible is vivid with the truth that Satan can cause disease. Acts 10:38 says that Jesus “went about doing good and healing all who were oppressed by the devil, for God was with him.” The devil had oppressed people with sickness. In Luke 13 Jesus finds a woman who had been bent over, unable to stand up for eighteen years. He heals her on the Sabbath, and in response to the criticism of the synagogue ruler he says, “Ought not this woman, a daughter of Abraham whom Satan bound for eighteen years, be loosed from this bond on the Sabbath day?” (v. 16). There is no doubt that Satan causes much disease.

This is why Christ’s healings are a sign of the in-breaking of the kingdom of God and its final victory over all disease and all the works of Satan. It is right and good to pray for healing. God has purchased it in the death of his Son, with all the other blessings of grace, for all his children (Isa. 53:5). But he has not promised that we get the whole inheritance in this life. And he decides how much. We pray, and we trust his answer. If you ask your Father for bread, he will not give you a stone. If you ask him for a fish, he will not give you a serpent (see Matt. 7:9- 10). It may not be bread. And it may not be a fish. But it will be good for you. That is what he promises (Rom. 8:28).

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But beware lest anyone say that Satan is sovereign in our diseases. He is not. When Satan went to God a second time in the book of Job, God gave him permission this time to strike Job’s body. Then “Satan went out from the presence of the LORD and smote Job with sore boils from the sole of his foot to the crown of his head” (Job 2:7, AT). When Job’s wife despaired and said, “Curse God and die” (2:9),” Job responded exactly as he did before. He looked past the finite cause of Satan to the ultimate cause of God and said, “Shall we receive good from God, and shall we not accept evil?” (2:10, AT).

And lest we attribute error or irreverence to Job, the writer closes the book in the last chapter by referring to Job’s terrible suffering like this: “Then came to him all his brothers and sisters. . . . and comforted him for all the evil that the LORD had brought upon him” (42:11). Satan is real and full of hate, but he is not sovereign in sickness. God will not give him even that tribute. As he says to Moses at the burning bush, “Who has made man’s mouth? Who makes him mute, or deaf, or seeing, or blind? Is it not I, the LORD?” (Ex. 4:11; see also 2 Cor. 12:7-9).” (Suffering and the Sovereignty of God page 24-25 – John Piper, Justin Taylor, 2006)