Hume on Miracles: A Wise Man Proportions His Belief to Evidence

The Quote

"A wise man proportions his belief to the evidence... The plain consequence is (and it is a general maxim worthy of our attention), 'That 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 endeavours to establish.'" This is Hume's maxim, from Section X of the Enquiry Concerning Human Understanding, and it has set the terms of the philosophy of miracles ever since.

Context

Hume published the Enquiry Concerning Human Understanding in 1748, recasting the arguments of his earlier Treatise of Human Nature (1739-1740) in a more accessible form. Section X, "Of Miracles," was so controversial that it was removed from early editions and published separately. The argument is deceptively simple: a miracle is a violation of a law of nature; a law of nature is established by uniform human experience; human testimony is fallible; therefore the testimony for a miracle must always be weighed against the uniform experience that establishes the law it violates. The maxim states the condition under which testimony for a miracle could be rationally accepted.

Meaning

The maxim has two parts. First, the epistemological principle: a wise person proportions belief to evidence. This is the empiricist's creed — that belief should track evidence, neither exceeding nor falling short of it. Second, the application to miracles: no testimony establishes a miracle unless the falsehood of the testimony would be more miraculous than the miracle it reports. The force of the maxim is in the comparison of improbabilities. The report of a resurrection, say, must be weighed against the improbability that the dead return to life — and the latter improbability is established by the uniform experience of all human history, while the former is established by the testimony of a few witnesses. Hume's point is that the testimony is always, in practice, outweighed. He allows that a miracle might occur; he denies that we could ever have sufficient reason to believe a report of one.

Philosophical Interpretation

Hume's argument is a paradigm of empiricist epistemology, but it has been disputed at every level. The first dispute is about what a miracle is. Hume defines it as a violation of a law of nature; some defenders of miracles argue that a miracle is not a violation but a God-wrought exception to the usual course — that is, an act of a different kind, not a break in the natural order. On this reading, a miracle does not contradict the law of nature (which describes the usual course) but adds to it (the divine act). The second dispute is about evidence. Hume assumes that the evidence for a law of nature is always stronger than the evidence for a violation; critics argue that this stacks the deck, because it assumes in advance that the very testimony being evaluated is unreliable. The third dispute is about testimony itself. Hume treats the witness as a fallible reporter whose reliability is itself established by experience; defenders of miracles argue that the character, number, and willingness to suffer of the witnesses (as in the apostolic witness to the resurrection) can make their testimony reliable in a way Hume's abstract calculus does not capture.

The Uniformity of Nature

The deepest issue Hume raises is about the uniformity of nature. Hume himself, in other parts of his philosophy, denied that we have any rational ground for believing in the uniformity of nature — we have a habit of expecting the future to resemble the past, but no proof that it must. This is a notorious tension in Hume's thought: the argument against miracles seems to rely on the very uniformity of nature that Hume elsewhere says we cannot justify. Critics have argued that Hume cannot have it both ways — that he cannot deploy the uniformity of nature against miracles while denying that we have any ground for it. Defenders of Hume reply that the argument does not require a proof of uniformity; it requires only that the evidence for the usual course (which is vast) is stronger than the evidence for the exception (which is a few testimonies). On this reading, the argument is comparative: even if we cannot prove the uniformity of nature, the evidence for the usual course still outweighs the evidence for the violation.

Legacy

Hume's argument set the terms of the debate about miracles for two and a half centuries, and it remains the starting point of every serious discussion. Richard Swinburne has offered the most influential modern response, arguing that if theism is probable (so that a God who has reason to act exists), and if the historical evidence for a particular event is strong, then the violation of a law of nature can be rational to believe. The argument requires a prior case for theism — a return to natural theology that Hume would have resisted. The deeper legacy of Hume's maxim is not in its conclusion but in its method: the insistence that belief be proportioned to evidence, that testimony be evaluated, that the credulous acceptance of the marvelous be resisted. This is the empiricist's contribution to the wisdom of religion, and it is not a small one.

The Deeper Lesson

The deepest lesson of Hume's argument is not that miracles do not happen but that the burden of proof lies where it lies. The person who reports a miracle bears the burden of showing that the report is more reliable than the uniform experience it contradicts. This is not a special rule against religion; it is the rule we apply to every extraordinary claim. If someone reports that they saw a man walk through a wall, we do not believe them without evidence that would make their report more reliable than the laws of physics it contradicts — and we are right not to. Hume's wisdom is the wisdom of proportion: do not believe more than the evidence supports, and do not believe less. The application to miracles is one instance of a larger epistemic virtue — the virtue of taking evidence seriously, whether it points where we want it to or not.

Relations

This quote is the foundational statement of the philosophy of miracles and the empiricist challenge to natural theology. It belongs to Hume, whose later Dialogues Concerning Natural Religion carried the critique into the design argument, and it has been answered most fully by modern theists like Swinburne. It stands in tension with the Thomistic tradition that takes miracles as divine acts within, not violations of, the natural order.

Sources

1. "David Hume." Stanford Encyclopedia of Philosophy. https://plato.stanford.edu/entries/hume/
2. "Miracles." Stanford Encyclopedia of Philosophy. https://plato.stanford.edu/entries/miracles/
3. David Hume. An Enquiry Concerning Human Understanding. Edited by L. A. Selby-Bigge, 3rd ed. by P. H. Nidditch. Oxford: Clarendon Press, 1975. Section X.