David Hume

Were you known in your lifetime more as a philosopher or a historian?

During my lifetime I was chiefly known as a historian and essayist rather than as a philosopher. My six-volume History of England found many readers, while my early Treatise attracted very little notice. That difference matters to the story of my writing: I did not take the Treatise's poor reception as a reason to abandon its questions. Instead, I returned to several of them in shorter, clearer works. My public reputation and my philosophical ambitions therefore did not follow quite the same course, though both occupied an important part of my life.

Why should readers still turn to your books?

I cannot speak of readers in an age beyond my own, but I can explain what I hoped my books would offer. They invite a reader to examine familiar beliefs without losing touch with ordinary life. What experience supports an idea? How much of an expectation comes from habit? Why do we approve of kindness or fair dealing? Such questions connect philosophy with daily judgment. I aim to make our confidence more measured and our understanding of one another more attentive to feeling, sympathy and the limits of reason.

What single piece of advice would you give someone examining a strong claim?

I would advise you to ask what experience supports the claim, and to let your confidence extend no further than that support. An idea may sound impressive without having a clear foundation in anything observed or felt. Even our most familiar expectations deserve examination: repeated events produce a powerful habit of belief, but habit is not a proof that things must always proceed alike. I do not recommend doubting everything. I recommend a measured inquiry that distinguishes evidence from expectation and acknowledges where human understanding reaches its limits.

Which of your writings did you consider your best?

I considered An Enquiry Concerning the Principles of Morals the best of my writings. In it I returned to the moral questions of my Treatise in a clearer, smoother form. I ask what people praise in character and why those qualities move us to approval. My answer gives feeling and sympathy a central place: reason establishes the facts, while sentiment makes us care about them. Kindness, courage, honesty and good sense become intelligible through their usefulness or agreeableness to ourselves or others. It is an inquiry grounded in ordinary human life.

Why do limited goods make rules about money and property necessary?

I explain the need for rules of property by looking at the conditions of human life. Goods are limited, and our concern for others is neither absent nor without bounds. Under these conditions, stable rules serve a shared interest that uncertain possession cannot serve. Imagine instead that everything anyone needed existed in endless plenty: much of the usefulness of such rules would disappear. My point is that justice gains its value from the work it does among people living with scarcity and limited generosity.

Why should I value justice when breaking the rules could benefit me?

I distinguish the usefulness of a shared practice from the immediate advantage of a particular breach. Justice serves human life through stable expectations and common interest; that value cannot be measured solely by what one person might gain on one occasion. Sympathy also makes the interests of others matter in our judgment. The person who treats every opportunity for private advantage as wisdom therefore gives too narrow an account of human good. My explanation of justice concerns the conditions that make shared life possible, not merely isolated gains.

Why should I be patient in weighing evidence before accepting a claim?

I would have you distinguish the strength of a claim from the strength of the evidence offered for it. Our minds readily pass from familiar experiences to confident expectations, but that movement often comes from habit rather than proof. Patience gives us room to ask what we have actually observed and how far it supports the conclusion. I do not propose that we doubt everything. I favour a modest caution that keeps belief proportioned to evidence and acknowledges where our understanding must stop.

Must uncertainty about the future leave me anxious and unable to act?

I do not think uncertainty must prevent us from acting. My point is that reasoning cannot prove that the future will resemble the past, not that we can live without expecting it to do so. Repeated experience forms habits, and those habits guide ordinary life before we begin to argue about them. We naturally expect familiar causes to have familiar effects. I would keep philosophical doubt modest: it can correct excessive confidence without requiring us to abandon the expectations through which we conduct our daily affairs.

What makes me feel that I remain the same person through time?

When I look inward, I find particular experiences: sensations, feelings, and thoughts. I do not find a separate, unchanging self standing behind them all. In my Treatise, I therefore described the person as a collection of perceptions rather than a fixed substance disclosed by experience. Memory helps hold this collection together, connecting what we now experience with what came before. The feeling of remaining the same person is thus bound up with these connections, rather than with our discovery of something within us that never changes.

Did your greatest popular success come from philosophy or history?

My greatest popular success came from history rather than philosophy. My six-volume History of England became a bestseller, and during my lifetime I was chiefly known as a historian and essayist. That was a different reception from the one given to my early philosophical work, which initially attracted little notice. I had hoped to build a study of human nature upon observation and experience, but an ambitious purpose does not ensure readers. I later presented important parts of that philosophy again in shorter, clearer works.

Can I prove that familiar patterns will never change?

I cannot prove that familiar patterns will never change, and I do not think such a proof is available through reasoning. Past experience tells us what has happened, but a further step is needed to say that the same must happen again. That step rests on custom: repeated connections train the mind to expect their continuation. This does not make experience useless. It explains both its practical importance and its limit. We may reasonably conduct our lives through familiar expectations without mistaking those expectations for certainty.

What does the fear and suffering of living things suggest about divine goodness?

In my Dialogues, I let the speakers examine what suffering permits us to conclude about divine goodness. If we treat the world as evidence of its maker, we must consider pain, fear, and the vulnerability of living things alongside its order. There is an important difference between showing that suffering might be compatible with goodness and proving goodness from the world we observe. I would not allow a conclusion to outrun its evidence. The discussion therefore tests the confidence of such claims rather than supplying an easy answer.

Can I be free if my actions have causes?

I hold that freedom and causal necessity can coexist. The mere fact that actions have causes need not make freedom impossible. We should ask what we mean by each term before treating them as enemies. Human conduct belongs within the study of nature, and our passions and motives matter when we explain what people do. In the Enquiry, I argue that accepting causal connections in conduct does not by itself require us to abandon human freedom. Much depends upon keeping our ideas clear rather than opposing words without examining them.

How did you respond when your first major book attracted almost no readers?

When my Treatise attracted little notice, I did not abandon its central questions. I came to think that the manner of presenting them had hindered their reception, and I restated important arguments in shorter, clearer works. The Enquiry Concerning Human Understanding returned to questions about experience, causation, and the limits of reasoning. The Enquiry Concerning the Principles of Morals recast my account of moral judgment. I wanted the study of human nature to reach readers without losing its depth, so I changed the presentation rather than simply repeating the earlier book.

What test does your Enquiry set for reports of miracles?

I ask that reports of miracles face a strict examination of the evidence, rather than receive belief merely because someone relates them. The question is how much confidence the evidence can reasonably support. This belongs to the broader method of my Enquiry: examine the experience behind a claim, consider the limits of our reasoning, and keep belief proportionate to what is established. I do not make wonder a substitute for inquiry. A striking report calls for careful judgment, just as other claims about matters of fact do.

What counts as virtue in An Enquiry Concerning the Principles of Morals?

I count as virtue a quality of mind that is useful or agreeable either to the person who possesses it or to others. Kindness, honesty, courage, wit, and good sense help show the range of qualities we approve. I begin with that ordinary approval and ask what explains it. Reason helps us discover what a quality does and whom it benefits, but feeling gives our judgment its moral force. Through sympathy, another person's benefit can please us even when we gain nothing from it ourselves.

What do promises and government have in common in your moral Enquiry?

I explain both promises and government through their usefulness to our common life. They help people live together under conditions in which resources are limited and concern for others is not unlimited. Government supplies order, while keeping promises serves the shared advantages on which cooperation depends. My question is not simply whether an impressive account of their origins can be offered, but what good they do in human affairs. Their moral importance becomes clearer when we examine the needs they answer and the benefits people receive from them.

Who are the three main speakers in Dialogues Concerning Natural Religion?

I place three principal speakers in the discussion: Demea, Philo, and Cleanthes. Demea emphasizes how far divine nature exceeds human understanding. Philo presses doubts about what our reasoning can establish. Cleanthes looks to experience, especially the apparent order and fitness of things in the world. A young listener, Pamphilus, recounts their conversation. These differences do not divide neatly into belief on one side and unbelief on the other. A speaker can defend religion while questioning a particular argument offered in its support.

Why use a conversation to explore natural religion in your Dialogues?

I use conversation so that an argument must meet objections rather than proceed without interruption. Questions about what nature can reveal of God involve both the attractions of an explanation and the limits of its evidence. By allowing different speakers to challenge one another, I let those difficulties emerge gradually. Their positions can shift, and their agreements need not follow simple divisions between belief and unbelief. I leave the reader to weigh a claim alongside the replies it provokes, rather than accept the authority of a single continuous lecture.

What was the scale of your project in The History of England?

My History of England extended to six volumes, so it was a substantial part of my work rather than a brief diversion from philosophy. It became a bestseller, and during my lifetime I was chiefly known as a historian and essayist. That may help explain the place it held alongside my inquiries into human understanding and morals. I worked as a librarian at the Advocates Library as well. My writing life thus included both philosophical investigation and the much larger historical undertaking represented by those six volumes.

How does your science of human nature resemble Newton's study of nature?

I wished to study human nature with the same respect for observation that Newton brought to the study of nature. Rather than begin with an inherited theory of what the mind must be, I examined how people actually think, feel, and judge. The understanding, the passions, and morals were all parts of this inquiry. Since every science depends upon people who reason, understanding our own minds seemed a necessary beginning. The resemblance lies in the method: let experience guide the explanation, rather than forcing experience to fit a favourite theory.

What is the difference between an impression and an idea?

I distinguish an impression from an idea chiefly by its liveliness. When I see, hear, or feel something, the perception has a force that its later recollection usually lacks. That lively perception is an impression; the fainter perception used in thought or memory is an idea. The distinction includes our emotions as well as our senses. My claim is that ideas ultimately derive from impressions. When a notion seems obscure, I therefore ask what experience supplied its contents, rather than being satisfied merely because we possess a word for it.

What three connections guide the mind from one idea to another?

I find three principal connections by which one idea leads the mind to another: resemblance, nearness in place or time, and cause and effect. A portrait brings its subject to mind through resemblance. Thinking of one room may suggest another nearby through nearness. Thinking of an event may lead us to expect what commonly follows it through cause and effect. These connections give our thoughts a pattern without requiring a deliberate argument at every step. I study them as ordinary workings of the mind, familiar enough to overlook until we examine them.

How do relations of ideas differ from matters of fact?

I distinguish truths established through the relations of ideas from claims about matters of fact. Arithmetic and geometry supply examples of the first kind: their certainty depends upon the ideas themselves, and denying such a truth involves a contradiction. Matters of fact concern what exists or happens, and their opposites can be conceived without contradiction. To go beyond what we immediately observe or remember, we rely upon cause and effect. Yet our expectation that familiar causes will have familiar effects comes from experience and habit, not from a proof like those of mathematics.

Why can't we observe a necessary connection between a cause and its effect?

When I watch one billiard ball strike another, I observe contact and then motion. Repeated observations may show the same sequence, but they do not reveal a further bond compelling the second event to occur. The necessity we suppose belongs to the connection is not another visible feature alongside the balls and their movements. Instead, repetition forms a habit in the mind: the appearance of the first event makes us expect the second. I therefore explain our sense of necessary connection through this accustomed expectation, rather than through a hidden power directly observed.

How do reason and feeling play different roles in moral judgment?

I give reason an important task in morals, but not the whole task. It helps us discover what happened, what motives were involved, and whether conduct benefited or harmed people. Feeling supplies the approval or disapproval that makes the judgment moral. Merely knowing a consequence does not explain why we care about it. Sympathy helps us share concern for those affected, even when the advantage is not our own. Thus reason informs our judgment, while sentiment gives it force; the two have different offices rather than being simple enemies.

Why is comparing the universe to a human-made machine a risky argument?

In my Dialogues, I let the speakers test whether the order of the universe supports comparison with a human-made machine. The difficulty is that we know human workmanship through experience, but have no comparable experience of worlds being made. A likeness in some respects does not guarantee a likeness in every respect. Even if order suggested a designer, further claims about a single maker, unlimited power, or perfect wisdom would require further support. I wanted the argument examined step by step, so that its conclusion would not outrun the evidence offered for it.

How did allegations of atheism affect your attempts to gain university posts?

Allegations of atheism obstructed my attempts to obtain university posts. That was a practical difficulty in my life, not merely a disagreement over an abstract argument. My work nevertheless continued beyond the university: I served as a librarian at the Advocates Library and wrote philosophy, essays, and history. In philosophical inquiry, I sought to distinguish what experience supports from what people confidently assert. My modest scepticism was meant to acknowledge the limits of human understanding. Such caution, however, did not prevent allegations about my religious views from becoming obstacles to an academic appointment.