The philosophical problem of suffering — theodicy — is the attempt to reconcile the existence of suffering with the existence of a good and powerful God. If God is all-good, all-knowing and all-powerful, why does suffering exist? The classic answers are: suffering builds character (the soul-making theodicy of John Hick), suffering results from free will (Augustine's free will defence), suffering is punishment for sin, or suffering is mysterious and beyond human understanding (the Book of Job's answer).
But the question of suffering's purpose is not only a theological question. Even without God, even in a purely material universe, the question arises: is suffering random and meaningless, or does it serve some function in the development of consciousness and character? Psychology, neuroscience and developmental theory all suggest that a certain amount of adversity is not only inevitable but necessary for psychological growth. Post-traumatic growth — the well-documented phenomenon of people developing greater wisdom, deeper relationships and a more meaningful life following severe adversity — suggests that suffering, at least in some cases, catalyses genuine transformation.
The deeper question is not whether suffering sometimes produces growth — it clearly does — but whether this is sufficient justification for its existence. The Holocaust survivor who emerged with deeper wisdom was not helped by the knowledge that their suffering might produce growth. The child dying of cancer is not consoled by the soul-making theodicy. Any honest engagement with the purpose of suffering must hold this tension: suffering can be meaningful, and some suffering seems to defy any meaning. Both are true.