Are miracles real?

What is a miracle?

A miracle, in the traditional religious sense, is an event that violates or suspends the natural laws of the universe and is attributed to divine intervention. The word comes from the Latin miraculum, meaning “object of wonder.” In Christianity, a miracle is an act of God that breaks the ordinary course of nature. In Islam, miracles are signs (ayat) from Allah meant to confirm the truth of a prophet’s message. In Hinduism, miracles are demonstrations of divine power (siddhi) that saints and gods perform to aid devotees or establish cosmic order.

The definition matters because it sets the bar for what counts. If a miracle is merely something surprising or improbable — a last-minute recovery, an unlikely coincidence — then miracles happen all the time and the word loses its meaning. If a miracle is a genuine suspension of natural law by a supernatural agent, then the claim is extraordinary, and extraordinary claims require extraordinary evidence. Most serious discussions of miracles use the stronger definition, because that is what believers are actually claiming when they say God intervened in the world.

Miracles in Christianity

Christianity is built on miracle claims. The two most important are the virgin birth and the bodily resurrection of Jesus. Without the resurrection, the apostle Paul wrote, the entire faith is “in vain” (1 Corinthians 15:14). The Gospels record dozens of miracles attributed to Jesus: turning water into wine at Cana, feeding five thousand people with five loaves and two fish, walking on water, healing the blind and the lame, raising Lazarus from the dead, and ultimately rising from his own tomb three days after crucifixion.

The Catholic Church has a formal apparatus for investigating miracle claims. The Vatican Congregation for the Causes of Saints requires at least two verified miracles — typically medical healings that defy scientific explanation — before canonizing a saint. The process involves medical boards, sworn testimony, and review by a “devil’s advocate” whose job is to challenge the claim. As of 2024, the Church has canonized over 10,000 saints, each with at least one approved miracle.

Protestant Christianity generally accepts biblical miracles as historical events but is more skeptical of post-biblical miracle claims. Many evangelical churches teach that the “age of miracles” ended with the apostles (a position called cessationism), while Pentecostal and charismatic traditions insist that miracles — speaking in tongues, faith healing, prophecy — continue today. The disagreement within Christianity itself is revealing: even believers cannot agree on whether miracles are still happening.

Miracles in Islam

Islam’s central miracle claim is the Quran itself. Muslim theology holds that the Quran is the literal, unaltered word of Allah, revealed to the Prophet Muhammad through the angel Gabriel over 23 years. The Quran is considered i’jaz— inimitable, impossible to replicate in its literary perfection, its prophetic accuracy, and its scientific foreknowledge. The “Quran challenge” (Quran 2:23) asks skeptics to produce a single chapter of comparable quality; Muslims argue that in 1,400 years, no one has succeeded.

Beyond the Quran, Islamic tradition records several miracles of Muhammad: the splitting of the moon (Quran 54:1–2), the night journey (Isra and Mi’raj) from Mecca to Jerusalem and then to heaven, water flowing from his fingers, and the multiplication of food. The hadith literature is rich with such accounts, though their historical reliability varies. Sunni and Shia traditions differ on which miracle accounts are authentic.

The miracle of the Quran raises a particular epistemological problem: the claim that a text is inimitable is unfalsifiable. Literary quality is subjective. Many Arabic-speaking scholars and poets, both Muslim and non-Muslim, have pointed out that the Quran contains grammatical irregularities, repetitions, and passages that are difficult to parse. Whether these represent divine complexity or human imperfection depends entirely on the assumptions you bring to the reading.

Miracles in other religions

Miracle claims are not unique to the Abrahamic faiths. Hinduism records countless miracles performed by gods and saints: Krishna lifting the Govardhana hill, Hanuman leaping across the ocean to Lanka, Sai Baba of Shirdi materializing objects and healing the sick. Modern Hindu gurus like Sathya Sai Baba (1926–2011) claimed to produce sacred ash (vibhuti) from thin air and to materialize gold jewelry — claims that were repeatedly exposed as sleight of hand by investigators, including the Indian rationalist Basava Premanand.

Buddhism, while philosophically less focused on the supernatural, records miracles attributed to the Buddha: walking on water, multiplying his body, flying through the air. The Pali Canon describes the “twin miracle” (yamaka-patihara), in which the Buddha simultaneously emitted fire and water from his body. Japanese Buddhism has its own tradition of miracle-working monks. Tibetan Buddhism holds that advanced practitioners can achieve the “rainbow body” — dissolving into light at death.

Ancient Greek religion attributed miracles to Asclepius, the god of healing, whose temples were filled with inscriptions from grateful patients who claimed to have been cured. Ancient Egyptian religion recorded miracles performed by priests and pharaohs. The pattern is universal: every culture that has produced a religion has also produced miracle claims, and the structure of those claims — divine healing, supernatural transport, control over nature — is remarkably consistent across traditions that had no contact with each other.

Hume’s argument against miracles

The most influential philosophical argument against miracles was made by David Hume in Section X of his Enquiry Concerning Human Understanding(1748). Hume’s argument is often misunderstood as claiming that miracles are impossible. It does not. What Hume actually argues is that testimony for a miracle can never be sufficient to establish it rationally.

The argument proceeds in two stages. First, Hume defines a miracle as a violation of a law of nature. Laws of nature are established by uniform, repeated experience — the sun rises every morning, unsupported objects fall, dead people stay dead. A miracle is, by definition, a counter-instance to this otherwise exceptionless regularity. Second, Hume argues that the evidence for the regularity of natural law will always outweigh the evidence for a single exception to it. We have overwhelming, repeated, cross-cultural evidence that natural laws hold. Against that, we have testimony — often secondhand, often from credulous or interested parties — that on one occasion a natural law was broken.

Hume puts it precisely: “No testimony is sufficient to establish a miracle, unless the testimony be of such a kind, that its falsehood would be more miraculous than the fact which it endeavors to establish.” In other words, before accepting that a dead man rose from the grave, you must rule out every alternative explanation — misperception, fraud, legend, hallucination, exaggeration — and determine that all of those are less probable than an actual suspension of natural law. That is a bar that testimony alone has never cleared.

Hume adds four supplementary considerations. First, no miracle in history has been attested by a sufficient number of educated, disinterested witnesses. Second, people have a natural love of wonder that predisposes them to accept extraordinary claims. Third, miracle reports come disproportionately from “ignorant and barbarous nations.” Fourth, the miracle claims of different religions cancel each other out: the miracles of Christianity undermine Islam, and vice versa, since accepting one set requires rejecting the others.

The problem of competing miracle claims

This last point — the problem of competing miracle claims — is one of the most powerful arguments against using miracles as evidence for any particular religion. Christians point to the resurrection of Jesus as proof of Christianity. Muslims point to the inimitability of the Quran as proof of Islam. Hindus point to the miracles of Krishna and modern gurus. Catholics point to the miracles at Lourdes; Mormons to the golden plates of Joseph Smith; followers of Sathya Sai Baba to his materializations.

These claims cannot all be true simultaneously, because the religions they support make mutually exclusive claims about the nature of God, the path to salvation, and the structure of reality. If the resurrection proves Christianity, then the miracles of the Quran cannot also prove Islam, because Christianity and Islam disagree on whether Jesus was divine. If the miracles at Lourdes prove Catholicism, they cannot also validate Hinduism, which denies that Mary was the mother of God.

The believer in any one religion must therefore explain why the miracle claims of their own tradition are genuine while the equally sincere, equally attested miracle claims of every other tradition are false. The most common explanations — that the other miracles are demonic deception, that the other witnesses were mistaken, that the other traditions are corrupted — apply equally well to one’s own tradition when viewed from the outside. The skeptic simply applies the believer’s own reasoning consistently across all traditions, including theirs.

Modern miracle claims: Lourdes, weeping statues, and apparitions

The Catholic shrine at Lourdes, France, is the most studied site of alleged miraculous healings in the world. Since 1858, when a 14-year-old girl named Bernadette Soubirous reported seeing the Virgin Mary in a grotto, millions of sick pilgrims have visited. The Lourdes Medical Bureau, established in 1905, reviews claims of miraculous cures. Of the roughly 7,000 cases submitted since then, the Bureau has declared only 70 “medically inexplicable” — about 1 in 100. Of those, the Church has formally recognized only 70 as miracles.

The numbers are striking for what they reveal. The overwhelming majority of pilgrims to Lourdes are not healed. The tiny fraction who do experience unexpected recoveries are mostly cases of spontaneous remission — a well-documented phenomenon in medicine that occurs at roughly the same rate regardless of religious belief or practice. The base rate of spontaneous remission for some cancers is around 1 in 60,000 to 1 in 100,000. With millions of visitors, a handful of recoveries is statistically expected, not miraculous.

Weeping statues — statues of the Virgin Mary or saints that appear to produce tears, blood, or oil — have been reported hundreds of times across the Catholic world. In virtually every case where independent investigation has been permitted, the explanation has been mundane: condensation, capillary action through porous materials, deliberate fraud, or contamination. In 1985, a weeping statue in a Chicago church drew hundreds of thousands of pilgrims; the “tears” were later found to be sap from the wood. In 1995, a wave of “drinking milk” Hindu statues swept India; the phenomenon was explained by capillary action.

Natural explanations: cognitive biases at work

Cognitive science offers robust explanations for why people perceive miracles even when none have occurred. The most important mechanisms include:

Confirmation bias.People remember the hits and forget the misses. A person who prays for healing and recovers will attribute the recovery to prayer; a person who prays and does not recover is quietly forgotten. The prayers that “work” become stories; the prayers that don’t work disappear from collective memory. Over time, this creates a distorted sample in which miracles seem common.

Pattern recognition and agency detection.Human brains are evolved to detect patterns and to attribute agency to events. This was adaptive in our evolutionary history — better to falsely detect a predator than to miss a real one. But it also means we see intentions and purposes where none exist: in cloud formations, in coincidences, in the timing of events. When something improbable happens, the brain’s default response is “someone did this on purpose,” and if the event seems beyond human power, the attribution shifts to the divine.

Pareidolia. A specific form of pattern recognition in which the brain perceives meaningful images in random stimuli. People see the face of Jesus in toast, the Virgin Mary in a water stain, religious symbols in tree bark. These are not miracles; they are well-understood artifacts of how the human visual system processes ambiguous input.

The availability heuristic.Dramatic, emotionally charged events are more easily recalled than mundane ones. A single dramatic “miraculous” recovery is more memorable than ten thousand unanswered prayers, which distorts our intuitive sense of how often miracles happen.

Social reinforcement. Miracle claims gain credibility through repetition and social validation. When an entire community believes that a statue wept, individual doubters face social pressure to conform. The story grows in the telling. Details are added, objections are forgotten, and the event is retold as a settled fact rather than an ambiguous occurrence.

Medical “miracles” and spontaneous remission

One of the most common categories of modern miracle claims involves unexpected medical recoveries. A patient with terminal cancer goes into remission. A child with a severe disability suddenly improves. A person declared brain-dead shows signs of consciousness. These events are real, documented, and sometimes genuinely astonishing. The question is whether they require a supernatural explanation.

Spontaneous remission — the partial or complete disappearance of a disease without treatment, or with treatment that would not normally be expected to produce that result — is a recognized medical phenomenon. It has been documented across a wide range of conditions, including cancer, autoimmune diseases, and infections. The mechanisms are not fully understood, but they are increasingly explained by immunology: the body’s immune system occasionally mounts an effective response against a disease it had previously failed to control.

The crucial point is that spontaneous remission occurs at roughly the same rate regardless of religious belief, prayer, or pilgrimage. Studies of intercessory prayer — the largest being the 2006 STEP trial (Study of the Therapeutic Effects of Intercessory Prayer) funded by the Templeton Foundation — have found no statistically significant effect of prayer on health outcomes. If miracles were genuine divine interventions, we would expect them to cluster among the faithful. They do not.

What thinkers say

David Hume(1711–1776) established the philosophical framework that most skeptics still use: the evidence for natural regularity will always outweigh testimony for a single exception. No miracle claim has met his evidential bar in the nearly three centuries since he set it.

Baruch Spinoza(1632–1677) went further, arguing that miracles are logically impossible. If God is the author of natural law, then a miracle — a violation of that law — would mean God is contradicting himself. For Spinoza, a miracle would actually count as evidence against God, not for him.

Christopher Hitchens (1949–2011) argued that miracle claims are the weakest element of religious apologetics. “What can be asserted without evidence can also be dismissed without evidence,” he wrote in God Is Not Great. Hitchens pointed out that miracle reports have declined in frequency and scale as scientific literacy has increased — a pattern difficult to explain if miracles are real, but easily explained if they are products of ignorance and credulity.

Richard Dawkins emphasizes the statistical argument: in a world of eight billion people, extremely improbable events happen every day simply by chance. A one-in-a-million event will happen roughly 8,000 times a day somewhere on Earth. What feels like a miracle to the individual experiencing it is a statistical certainty at the population level.

C.S. Lewis (1898–1963), representing the theistic side, argued in Miracles(1947) that Hume’s argument begs the question by assuming naturalism. If God exists and is capable of acting in the world, then miracles are not violations of natural law but actions by a being who stands outside it. Lewis’s argument has force — but only if you have already accepted the existence of God on independent grounds. For the skeptic, it merely pushes the question back one step: what is your evidence for the God whose existence would make the miracle possible?

Key takeaways

Every major religion claims miracles, and those claims are mutually exclusive. The miracles of Christianity cannot simultaneously validate Christianity while the miracles of Islam validate Islam, because the two religions make incompatible claims about God, Jesus, and salvation. The skeptic’s position is simply to apply each religion’s skepticism about other religions’ miracles consistently to all of them.

Hume’s argument remains unrefuted after nearly three centuries: testimony for a miracle will always be weaker than the evidence for the natural regularity it claims to violate. Modern cognitive science explains why people perceive miracles — confirmation bias, pattern recognition, social reinforcement — without requiring anything supernatural. And the empirical evidence, from the Lourdes data to the STEP trial on prayer, consistently fails to support the reality of divine intervention.

None of this proves that miracles are impossible. It proves that we have no good reason to believe any particular miracle has occurred. The honest position is not certainty in either direction, but a recognition that the evidence overwhelmingly favors natural explanations for events that believers attribute to God. If a genuine miracle ever occurs, the scientific method is perfectly equipped to detect it. So far, it has not.

Sources

1. David Hume, An Enquiry Concerning Human Understanding, Section X: “Of Miracles” (1748).
2. C.S. Lewis, Miracles: A Preliminary Study (1947, revised 1960).
3. Baruch Spinoza, Tractatus Theologico-Politicus, Chapter VI (1670).
4. Christopher Hitchens, God Is Not Great: How Religion Poisons Everything (2007).
5. Herbert Benson et al., “Study of the Therapeutic Effects of Intercessory Prayer (STEP),” American Heart Journal151.4 (2006): 934–942.
6. Jacalyn Duffin, Medical Miracles: Doctors, Saints, and Healing in the Modern World (2009).
7. Richard Dawkins, The God Delusion, Chapter 4 (2006).