Another great one from the GotQuestions? site.
Question: “Is it true that everything happens for a reason?”
Answer: Does everything happen for a reason? The short answer is “yes”; because God is sovereign, there are no random, out-of-control happenings. God’s purposes may be hidden from us, but we can be assured that every event has a reason behind it.
There was a reason for the blindness of the man in John 9, although the disciples misidentified the reason (John 9:1–3). There was a reason for Joseph’s mistreatment, although his brothers’ purpose in what they did to him was very different from God’s purpose in allowing it (Genesis 50:20). There was a reason for Jesus’ death—the authorities in Jerusalem had their reasons, based on evil intent, and God had His, based on righteousness. God’s sovereignty extends even to the lowliest of creatures: “Not one [sparrow] falls to the ground apart from your Father’s will” (Matthew 10:29, NET).
Several factors help us know that everything happens for a reason: the law of cause and effect, the doctrine of original sin, and the providence of God. All these demonstrate that everything does happen for a reason, not just by happenstance or by random chance.