This is the question that stops more people in their tracks than any other. Not "can you prove God exists?" or "what about evolution?" — but this one: if God is good and all-powerful, why does he allow children to suffer? Why does cancer exist? Why do tsunamis kill thousands of innocent people?

It is the most honest objection to Christianity. It deserves the most honest answer.

Philosophers distinguish between two versions of the problem of evil.

The logical problem says: the existence of evil is logically incompatible with the existence of an all-good, all-powerful God. If God could prevent suffering and does not, he is either not good or not powerful. Therefore, God does not exist.

The evidential problem is softer: even if evil does not logically rule out God, the sheer amount and distribution of suffering in the world makes God's existence unlikely. There is just too much of it, and too much of it falls on people who did nothing to deserve it.

Both versions deserve a response.

The most well-known Christian response to the logical problem is the free will defense. God created human beings with genuine freedom — the capacity to love, to choose, to act. But genuine freedom means the capacity to do evil as well as good. A world with free creatures who can love is better than a world of robots who cannot. And a world where love is possible is a world where cruelty is also possible.

This explains a significant portion of human suffering — war, abuse, injustice, cruelty. These are not God's doing. They are the result of human choices.

But it does not explain natural evil — earthquakes, disease, cancer. For that, Christians point to a broader picture: a world that has been affected by the fall, a creation that is not yet what God intends it to be, and a God who is working toward a restoration that is not yet complete.

Another response, developed by the philosopher John Hick, is sometimes called the soul-making theodicy. The idea is that a world without any hardship would not produce the virtues that make human beings fully human — courage, compassion, perseverance, faith. Suffering is not good in itself, but it can be the context in which genuine character is formed.

This is not a comfortable answer. It does not explain why some people suffer far more than others, or why innocent children bear so much. But it points to something real: the people we most admire are almost always people who have been through something hard and come out the other side with depth and grace.

Here is the distinctively Christian answer — the one that goes beyond philosophy.

Christians do not believe in a God who watches suffering from a safe distance. We believe in a God who entered into it. Jesus Christ, the Son of God, was born into poverty, lived as a refugee, was betrayed by his friends, tortured, and executed. He cried out from the cross: "My God, my God, why have you forsaken me?"

That is not the cry of a God who is indifferent to suffering. That is God himself, in the middle of it.

The cross does not explain why suffering exists. But it tells us something about who God is in relation to it. He is not above it. He is in it. And the resurrection tells us that suffering does not have the final word.

When someone raises the problem of evil, they are often not asking a philosophical question. They are grieving. They have lost someone. They are in pain. The first response is not an argument — it is presence.

Do not say, "Everything happens for a reason." Do not say, "God needed another angel." Do not rush to explain. Sit with them. Grieve with them. And when the time is right, share the honest Christian answer: God is not absent from suffering. He entered it. And he promises to redeem it.

For more on the problem of evil and how to engage it in conversation, start with The Companion — it's free. For a deeper treatment of theodicy and the Christian response to suffering, explore The Field Guide.

The cross is not an explanation for suffering. It is God's answer to it.