Theologians blithely attribute pain to the Fall, ignoring the marvelous design features of the pain system. Every square millimeter of the body has a different sensitivity to pain, so that a speck of dirt may cause excruciating pain in the vulnerable eye whereas it would go unreported on the tough extremities. Internal organs such as the bowels and kidneys have no receptors that warn against cutting or burning—dangers they normally do not face — but show exquisite sensitivity to distention. When organs such as the heart detect danger but lack receptors, they borrow other pain cells ("referred pain"), which is why heart attack victims often report pain in the shoulder or arm. The pain system automatically ramps up hypersensitivity to protect an injured part (explaining why a sore thumb always seems in the way) and turns down the volume in the face of emergencies (soldiers often report no pain from a wound in the course of battle, only afterwards). Pain serves us subliminally as well: sensors make us blink several times a minute to lubricate our eyes and shift our legs and buttocks to prevent pressure sores. Pain is the most effective language the body can use to draw attention to something important.

On most interpretations of the theistic God, He desires His creatures to love Him. However, the mystery of evil conflicts with this desire. It is difficult for rational humans to love God when they do not understand why there is so much evil. If the reasons for evil are beyond humans' ken, God could at least make THIS abundantly clear. Why does He not do so? Moreover, why does not an all-powerful God have the power to raise human intelligence so humans can understand why there is so much evil? If there is reason for not doing this, then why is THIS not made clear? There is mystery on top of mystery here which seems to conflict explicitly with God's desire to be loved.

I've seen too much of hospitals to relish any idea of collective punishment. But, as you know, Christians sometimes say that sort of thing without really thinking it. They're better than they seem. [Father] Paneloux is a man of learning, a scholar. He hasn't come in contact with death; that's why he can speak with such assurance of the truth — with a capital T. Bet every country priest who visits his parishioners and has to hear a man gasping for breath on his deathbed thinks as I do. He'd try to relieve human suffering before trying to point out its excellence. If [I] believed in an all-powerful God [I] would cease curing the sick and leave that to Him. But no one in the world believed in a God of that sort; no, not even Paneloux, who believed that he believed in such a God. And this was proved by the fact that no one ever threw himself on Providence completely. [S]ince the order of the world is shaped by death, mightn't it be better for God if we refuse to believe in Him and struggle with all our might against death, without raising our eyes toward the heaven where He sits in silence?

His interest quickened when, in a more emphatic tone, the preacher said that there were some things we could grasp as touching God, and others we could not. There was not doubt as to the existence of good and evil and, as a rule, it was easy to see the difference between them. The difficulty began when we looked into the nature of evil, and among things evil he included human suffering. Thus we had apparently needful pain, and apparently needless pain; we had right that a libertine should be struck down, we see no reason for a child's suffering. And, truth to tell, nothing was more important on earth than a child's suffering, the horror it inspires in us, and the reason we must find to account for it. [H]e might easily have assured them that the child's sufferings would be compensated for by an eternity of bliss awaiting him. But how could he give that assurance when, to tell the truth, he knew nothing about it? For who would dare to assert that eternal happiness can compensate for a single moment's human suffering? He who asserted that would not be a true Christian, a follower of the Master who knew all the pangs of suffering in his body and his soul. No, he, Father Paneloux, would keep faith with that great symbol of all suffering, the tortured body on the Cross; he would stand fast, his back to the wall and face honestly the terrible problem of a child's agony. And he would boldly say to those who listened to his words today, "My brother, a time of testing has come for us all. We must believe everything or deny everything. And who among you, I ask, would dare to deny everything?"