David Hume
Quotes & Wisdom
David Hume: The Philosopher Who Woke the World from Dogmatic Sleep
David Hume demolished the comfortable certainties of his age with a smile and a well-turned sentence. The greatest philosopher to write in the English language, Hume argued that our most fundamental beliefs - in causation, in the self, in God - rest not on reason but on habit, sentiment, and the irresistible pull of human nature. His radical empiricism scandalized the religious establishment and sent shockwaves through philosophy that would, by Immanuel Kant's own admission, wake Kant from his "dogmatic slumber." Yet Hume was no gloomy skeptic: he was a sociable, witty, and generous man who believed that philosophy should enhance life rather than retreat from it. His enduring gift is the uncomfortable but liberating insight that certainty is rarer than we pretend, and that honest doubt is the beginning of wisdom.
Context & Background
David Hume was born on May 7, 1711, in Edinburgh, Scotland, into a family of modest landed gentry. His father practiced law and owned an estate at Ninewells near Berwick-upon-Tweed, but died when David was only two years old, leaving the boy to be raised by his mother Katherine. The Scotland of Hume's youth was a place of intellectual ferment - the Scottish Enlightenment was gathering momentum, and Edinburgh was transforming from a provincial capital into one of Europe's great centers of learning.
Hume matriculated at the University of Edinburgh at the astonishing age of ten, pursuing the standard curriculum of Greek, Latin, metaphysics, and natural philosophy. His family expected him to follow the law, but Hume found it distasteful. Instead, he read voraciously across history, literature, philosophy, and theology, driven by what he later described as "an insurmountable aversion to everything but the pursuits of philosophy and general learning."
The intensity of his intellectual life came at a cost. At twenty-three, the pressure of sustained mental exertion precipitated a nervous breakdown. Hume tried a stint as a merchant's clerk in Bristol - a spectacularly poor fit - before making the decision that would change the history of ideas: he retired to France to write.
Between 1734 and 1737, living modestly in La Fleche on the Loire in the old province of Anjou, Hume composed A Treatise of Human Nature, one of the most ambitious philosophical works ever written. He was twenty-six years old. The Treatise attempted nothing less than a complete science of human nature, built entirely on the foundation of experience and observation.
Hume's central argument was devastating in its simplicity. All our ideas, he claimed, derive from impressions - the raw data of sensory experience. We cannot think anything that does not ultimately trace back to something we have seen, heard, touched, tasted, or felt. This seemingly modest claim had explosive consequences. If all knowledge comes from experience, then many of our most cherished beliefs - including our belief in cause and effect - cannot be rationally justified.
We never actually perceive causation, Hume argued. We see one billiard ball strike another, and we see the second ball move. But we never see the "power" or "force" that connects the two events. Our belief in causation is not a product of reason but of habit - the mind's tendency to expect, based on past experience, that the future will resemble the past. This argument struck at the very foundations of scientific reasoning, and philosophers have been grappling with it ever since.
The Treatise was published in 1739-1740. It was, by Hume's own rueful account, a commercial disaster that "fell dead-born from the press, without reaching such distinction as even to excite a murmur among the zealots." This famous lament may have been somewhat exaggerated - the book did attract some attention - but it was certainly not the triumph the young philosopher had hoped for.
Hume responded to the Treatise's disappointing reception not with retreat but with reinvention. He recast his philosophical ideas in more accessible form, publishing An Enquiry Concerning Human Understanding in 1748 and An Enquiry Concerning the Principles of Morals in 1751 - the latter of which he considered "incomparably the best" of all his writings.
These works presented Hume's ideas with greater polish and strategic restraint. The Enquiry Concerning Human Understanding included his famous argument against miracles - that no testimony is sufficient to establish a miracle unless its falsehood would be more miraculous than the event it describes. This argument became one of the most influential pieces of philosophical reasoning ever published, and it continues to shape debates about the relationship between faith and evidence.
Hume's philosophical work made him notorious in religious circles, and when he applied for the Chair of Ethics and Pneumatical Philosophy at Edinburgh in 1745, vocal opposition from the clergy ensured his rejection. A similar fate awaited his application to Glasgow in 1752. The irony was not lost on Hume: the greatest philosopher Scotland had produced was unwelcome at Scotland's own universities.
Instead, Hume found an alternative path to intellectual prominence. An appointment as Librarian to the Edinburgh Faculty of Advocates gave him access to one of Scotland's finest collections of books, and he used it to write his History of England, published in six volumes between 1754 and 1762. The History was a bestseller that remained popular well into the nineteenth century, and it finally gave Hume the financial independence he had long sought.
Perhaps Hume's most radical contribution was his theory of morality. Against the rationalist tradition stretching from Plato through Rene Descartes, Hume argued that moral judgments are not products of reason but of sentiment - of our feelings of approval and disapproval. "Reason is, and ought only to be the slave of the passions," he declared - one of the most provocative sentences in the history of philosophy.
This did not mean, for Hume, that morality was arbitrary or meaningless. On the contrary, he believed that human beings are naturally endowed with a capacity for sympathy - the ability to feel what others feel - and that this shared emotional life provides a solid foundation for ethical behavior. Morality does not need God or pure reason to ground it; it needs only the natural human capacity for fellow-feeling.
This approach placed Hume in direct opposition to the prevailing religious morality of his time, and it anticipated many developments in modern moral psychology. His close friend Adam Smith would extend Hume's insights about sympathy into his own moral philosophy in The Theory of Moral Sentiments, and eventually into his economic theory in The Wealth of Nations. The two men's friendship - both personal and intellectual - stands as one of the most productive partnerships in the history of ideas.
Hume's most enduring philosophical legacy may be what is now called "the problem of induction." We all believe that the sun will rise tomorrow, that bread will nourish us, that water will quench our thirst. But what justifies these beliefs? We cannot prove them by logic alone - there is no logical contradiction in imagining that the sun might not rise tomorrow. And we cannot justify them by appealing to past experience, because that would be circular: we would be using past experience to justify our reliance on past experience.
Hume's conclusion was unsettling but honest: our most basic beliefs about the world cannot be rationally justified. We believe them because nature has made us so - because custom and habit, not reason, are "the great guide of human life." This conclusion does not mean we should abandon these beliefs; it means we should be humble about the foundations on which they rest.
The problem of induction remains unsolved. Karl Popper attempted to sidestep it through his theory of falsification, and others have proposed various solutions, but Hume's original argument retains its force. It stands as a permanent reminder that the gap between what we believe and what we can prove is wider than we usually acknowledge.
Hume spent his final years in Edinburgh, having built a house in the city's New Town. He was known to his friends as "le bon David" - a reference to both his good nature and his fame in France, where he had served as secretary to the British Embassy in Paris and had been lionized by the French philosophes.
Despite his philosophical skepticism, Hume was by all accounts a warm, generous, and sociable man. He loved good food, good conversation, and good company. He was, as he put it, "a man of mild dispositions, of command of temper, of an open, social, and cheerful humour, capable of attachment, but little susceptible of enmity, and of great moderation in all my passions."
When diagnosed with intestinal cancer in 1775, Hume faced death with the same composure he had brought to his philosophy. He arranged for the posthumous publication of his most controversial work, the Dialogues Concerning Natural Religion, composed a brief autobiography titled "My Own Life," and died peacefully on August 25, 1776. James Boswell, who visited the dying Hume hoping to find a deathbed conversion, was disconcerted to find the philosopher cheerful and entirely unrepentant.
Hume was a genuinely funny writer - a rarity among philosophers. His prose sparkles with wit and irony, and he wielded humor as a philosophical tool, using it to deflate pomposity and expose the absurdity of positions he opposed. His writing style influenced generations of essayists and remains a model of clear, engaging philosophical prose.
He was also portly and somewhat awkward in appearance - facts that amused him rather than troubled him. When the French philosopher d'Alembert remarked that Hume's appearance did not match his reputation, Hume reportedly laughed and agreed.
Hume's influence extends far beyond philosophy. His skepticism about causation influenced the development of modern statistical thinking. His moral psychology anticipated Darwin's theory of moral evolution. His political writings influenced the American founders, particularly James Madison. And his calm, empirical approach to the most difficult questions - about God, morality, knowledge, and human nature - established a template for intellectual inquiry that remains vital today.
His tomb stands on the southwestern slope of Calton Hill in Edinburgh's Old Calton Cemetery, a simple monument to a man who changed the way the world thinks.