Why Does God Allow Disease? A Comparative Religious Answer

Jewish scripture presents disease within a covenantal framework: obedience to God's commandments brings health, while violation invites sickness. Deuteronomy is remarkably direct about this. The promise in Exodus 15:26 conditions freedom from disease on listening to God's voice and keeping His statutes Exodus 15:26. Deuteronomy 7:15 extends this, promising that God will ward off sickness from the faithful and redirect it toward enemies Deuteronomy 7:15. Deuteronomy 28:61 goes further still, warning that even diseases not listed in the Torah can be brought upon the disobedient Deuteronomy 28:61.

Yet Jewish thought has never been content with a purely transactional model. The Book of Job—arguably the Torah's most sustained meditation on suffering—refuses easy answers. Job 37:13 acknowledges that God sends calamity and blessing alike, without always explaining why Job 37:13. The rabbis of the Talmudic period, including figures like Rabbi Akiva (c. 50–135 CE), developed the concept of yissurin shel ahavah—"afflictions of love"—suggesting that suffering can refine the righteous rather than simply punish the wicked. Isaiah 53:10 complicates matters further, describing a servant whom God "chose to crush by disease" for a redemptive purpose Isaiah 53:10, a passage that generated centuries of interpretive debate between Jewish and Christian readers.

Medieval philosopher Maimonides (1138–1204) argued in the Guide for the Perplexed that most human suffering is self-inflicted through poor choices, not direct divine punishment—a rationalist corrective to crude theodicy. Modern Jewish thinkers like Eliezer Berkovits grappled especially with disease and death after the Holocaust, insisting that divine hiddenness (hester panim) does not mean divine absence. The tradition holds these tensions without fully resolving them.

Christianity inherits the Hebrew Bible's covenantal theology of disease but reframes it decisively through the lens of Christ's suffering. The same Deuteronomic warnings and promises apply, but the New Testament introduces the idea that illness can serve redemptive, not merely punitive, ends. Isaiah 53:10's image of a servant crushed by disease for the sake of others became, for early Christians, a direct prophecy of Jesus Isaiah 53:10—meaning that even the worst suffering can be woven into a divine purpose that transcends individual guilt or innocence.

Christian theodicy—the theological defense of God's goodness in the face of evil and suffering—is one of the tradition's richest and most contested fields. Augustine of Hippo (354–430 CE) argued that disease and death entered the world through the Fall of Adam and Eve, making human sin the original cause of physical suffering. Thomas Aquinas (1225–1274) distinguished between God permitting evil and God willing it, arguing that God allows disease because He respects the natural order and human freedom, and can draw greater goods from suffering. More recently, Alvin Plantinga's "free will defense" (1974) and John Hick's "soul-making theodicy" (1966) represent two major Protestant and broadly Christian attempts to explain why a good God permits suffering.

The covenantal thread remains: Exodus 15:26's promise that God is "the LORD that healeth thee" is cited in Christian healing traditions as evidence that restoration is God's ultimate desire Exodus 15:26. Disease, in most mainstream Christian theology, is real and terrible—but not the final word. The resurrection of Christ is read as God's definitive answer to suffering and death.

Islamic theology approaches disease through the twin lenses of divine sovereignty (qadar) and mercy. A foundational hadith recorded in Sahih al-Bukhari states that the Prophet Muhammad ﷺ taught: for every disease Allah has created, He has also created a treatment Sahih al Bukhari 5678. This is a striking theological claim—it means disease is not an oversight or a cosmic accident, but a deliberate creation paired with a corresponding cure. Illness, in this view, is built into the fabric of creation purposefully.

The Qur'an (e.g., Surah Al-Baqarah 2:155–157) frames trials including illness as tests through which believers can earn spiritual reward and purification. Classical scholars like Ibn al-Qayyim al-Jawziyyah (1292–1350 CE) wrote extensively on the spiritual and physical dimensions of disease in his work Medicine of the Prophet, arguing that sickness strips away arrogance, draws the believer closer to God, and expiates sins.

Importantly, Islam firmly rejects superstitious explanations for illness. Two hadiths in Sahih Muslim explicitly deny that disease transmits through supernatural or hidden means independent of Allah's will Sahih Muslim 5800 Sahih Muslim 5805. Scholars interpret these narrations as a corrective against fatalistic or magical thinking: you don't get sick because someone cursed you or because of bad omens. Allah is the sole agent. This doesn't mean Muslims are passive—seeking medical treatment is considered a religious obligation by the majority of classical jurists, precisely because Allah created the cures Sahih al Bukhari 5678.

Disagreement exists within Islamic scholarship about whether specific illnesses are punishments for sin or simply trials. The dominant view, represented by scholars like Ibn Hajar al-Asqalani (1372–1449 CE), is that illness for a believer is primarily a mercy and a means of expiation, not a punishment.

Tanakh describes God as both healer and sovereign over affliction: God promises to withhold diseases from an obedient Israel, yet warns that plagues can come upon the nation for covenant breach Exodus 15:26Deuteronomy 28:61Deuteronomy 7:15. Job likewise wrestles with weather and events that God “causes … whether as a scourge or as a blessing,” signaling that suffering can function as chastisement or as part of inscrutable providence Job 37:13. Thus, Jewish sources frame disease within covenantal ethics (obedience/disobedience) and divine governance, while maintaining that God also heals Exodus 15:26Deuteronomy 7:15.

Christian reading of the Old Testament affirms that God both heals and can withhold or send disease in relation to righteousness and sin, echoing the covenantal logic addressed to Israel Exodus 15:26Deuteronomy 28:61. Isaiah’s vision includes suffering borne under God’s hand “by disease,” showing that affliction can lie within God’s redemptive purposes, even as life and restoration remain in view Isaiah 53:10. Accordingly, Christians hold together divine sovereignty, the call to faithful obedience, and prayer for healing, without denying that God may permit disease for purposes beyond immediate human grasp Exodus 15:26Isaiah 53:10.

Prophetic teaching holds that Allah created no disease without also creating its treatment, encouraging believers to seek cures while trusting divine decree Sahih al Bukhari 5678. Islam rejects superstitious attributions of harm—affirming that what occurs does so by Allah’s will—so fear of ominous signs or hidden transmissions is misplaced Sahih Muslim 5800Sahih Muslim 5805. In sum, disease exists under Allah’s control, remedies are part of His mercy, and believers combine tawakkul (trust) with active medical care Sahih al Bukhari 5678Sahih Muslim 5800.