Confessions of an English Opium-Eater is a memoir of addiction written from inside the habit. In an address to the reader, De Quincey explains that he is breaking the English reserve that keeps people from exposing their own scars, but that he does so on purpose: his record of an experience bought at a heavy price may, he hopes, prove useful and instructive to others. He refuses to call himself guilty. His life, he says, has on the whole been the life of a philosopher, and what he offers is the rare case of a man who indulged in opium to an excess he had never heard matched, yet struggled against it and at last untwisted the chain that fettered him.
The Preliminary Confessions supply the back-story the book says is needed to make the later opium dreams intelligible and to win the reader's sympathy. As a clever, restless schoolboy he quarrels with his guardians, runs away, and wanders through the mountains of Wales living on little. He then drifts to London, where for months he is destitute, sheltering in an empty house and on doorsteps, kept alive partly by the kindness of a young streetwalker named Ann, whom he loses when a planned meeting fails and never finds again. The hunger and exposure of these months, he argues, damaged his body in ways that would later make him reach for relief.
The Pleasures of Opium dates his first dose to 1804, when a college acquaintance recommends it for facial pain and a London druggist hands him the tincture across a counter. The effect is a revelation: not the rowdy excitement of wine but an abyss of divine enjoyment, a panacea that seems to make happiness purchasable for a penny. He distinguishes opium sharply from drink, claiming it steadies and concentrates the mind rather than scattering it, and for years he uses it as an occasional luxury, walking among the poor on Saturday nights or sitting transported at the opera, convinced he remains its master.
The Pains of Opium move the clock forward through years of settled dependence to the period when the drug exacts its price. De Quincey warns that his notes here are deliberately disjointed, given as he found them, because he cannot bear to build the whole burden of horrors into a tidy narrative. The center of the suffering is his dreams. A childhood power of summoning pictures on the darkness returns and grows monstrous: vast processions, buildings raised past the scale the eye can hold, oceans of faces, and recurring Oriental and Asiatic terrors. Space swells, time stretches so that a single night feels like a century, and over the splendour hangs a gloom he calls a kind of suicidal despondency.
The book closes on the struggle to get free. He describes the descent into near-paralysis, when reading, work, and ordinary duties become almost impossible, and then the painful reduction of his daily dose, which he documents down to a diary of laudanum drops. He triumphs, in his word, but is careful to deny any easy victory: even months later he is still shaken and racked, a man passing from one mode of existence into another. The moral, he says, is addressed to the opium-eater. If it teaches that the habit can be both terrible and, with motive and effort, renounced, the confession has done its work.