God & Reason
The Problem of Evil
The existence of suffering does not disprove God's existence; rather, understood in light of free will, sin, and Christ's own suffering, it reveals a God who respects human freedom and enters into our suffering to redeem it.
Catholic teaching
The Church teaches that God, who is infinitely good, permits evil only because he can draw a greater good from it, most supremely from the greatest evil ever committed, the murder of the innocent Son of God, from which came the redemption of the world. Moral evil arises from the misuse of the freedom God gave rational creatures, a freedom without which love would be impossible; physical evil and suffering enter a fallen world touched by sin, yet God does not remain distant from suffering but entered it personally in Christ. No complete answer to why God permits each particular evil is offered as an equation, but the Christian is given both a coherent framework and a companion in his own suffering.
Biblical foundation
The Book of Job wrestles at length with innocent suffering, and God's answer is not a tidy explanation but a revelation of his transcendence and Job's limited perspective, after which Job repents of demanding an accounting rather than trusting. Paul teaches that present sufferings are not worth comparing with the glory to be revealed, and that God works all things for good for those who love him. On the cross, Jesus himself cries out in abandonment, showing that God does not stand outside human suffering but has entered fully into it.
Scripture references
Historical evidence
St. Augustine, having lived for years as a Manichean who taught that evil was a positive substance rivaling good, converted to Christianity and formulated the classic Christian answer that evil is not a thing in itself but a privation, a lack of a good that ought to be present, arising from the misuse of created freedom. This 'privation theory' of evil, developed in the 4th-5th centuries, remains the standard Catholic philosophical framework and was later refined by Aquinas, showing an intellectual tradition that took the problem with utmost seriousness rather than dismissing it.
The Church Fathers
“God judged it better to bring good out of evil than to suffer no evil to exist.”
“How, if we had no knowledge of the contrary, could we have had instruction in that which is good?”