An Enquiry Concerning the Principles of Morals

David Hume opens An Enquiry Concerning the Principles of Morals by separating serious moral inquiry from argument sustained by vanity or obstinacy. A person may deny moral distinctions in debate, he argues, yet ordinary responses to character and action continually reveal judgments of right and wrong.

The central question concerns the foundation of those judgments. Do people know virtue through reason, chains of argument, and principles that should bind every rational mind? Or does morality arise through sentiment, an immediate internal sense closer to the perception of beauty and deformity? Hume treats the difference as consequential because each answer implies a different method for explaining praise, blame, and motivation.

Ancient philosophers often described virtue as conformity to reason but still relied on taste and feeling. Modern thinkers praised the beauty of virtue yet tried to derive it through abstract understanding. Hume uses that inconsistency to clear the ground for a more exact account of moral approval. This shift from abstract proof to experienced approval also changes how philosophical explanation can connect judgment with conduct. The enquiry is valuable for readers studying ethics, emotion, and moral psychology because it asks not only which actions are good, but what human faculty makes goodness matter to us.