Thou shalt not kill

The prohibition against killing, expressed in the biblical commandment "thou shalt not kill," runs through The Idiot as a principle that is simultaneously affirmed, questioned, and violated. The novel does not treat it as a self-evident moral foundation but as a site of intense conflict—between law and mercy, between justice and vengeance, between the state's power to execute and the individual's power to murder. Three distinct contexts give the commandment its dramatic weight: Prince Muishkin's horrified meditation on capital punishment, Rogojin's murder of Nastasia Philipovna, and the theological arguments about Christ, suffering, and the value of life.

Capital Punishment as the Inversion of the Commandment

Muishkin's most sustained reflection on killing occurs not in response to a murder but to a legal execution. On his first morning in Petersburg, he tells General Epanchin's servant about an execution he witnessed in Lyons: a man named Le Gros was guillotined, and the prince describes the scene with visceral horror. "Because it is said 'thou shalt not kill,' is he to be killed because he murdered some one else?" he asks. "No, it is not right, it's an impossible theory" . For Muishkin, the commandment does not merely forbid private killing; it condemns the state's killing as well, and with greater force. He argues that a judicial execution is "immeasurably more dreadful" than a murder committed by a criminal, because the condemned man's last hope—the possibility of escape or mercy—is replaced by absolute certainty . The worst part, he insists, is not the physical pain but the mental anguish: the certain knowledge that in an hour, in ten minutes, in half a minute, "your soul must quit your body and that you will no longer be a man" . He calls the guillotine "an outrage on the soul" and declares that no man should be treated so, repeating "no, no! no man should be treated so, no man, no man!" . This speech establishes Muishkin as a character who takes the commandment with radical seriousness, extending it beyond the usual scope of interpersonal morality to the very structure of legal punishment.

Rogojin's Murder and the Violation of the Commandment

The novel's central violation of "Thou shalt not kill" is Rogojin's murder of Nastasia Philipovna. Rogojin kills her with a garden knife, stabbing her under the left breast in the early morning hours after she has fled from her wedding to Muishkin . The murder is presented not as a crime of passion in the ordinary sense but as the culmination of a long, obsessive love that has always been mingled with hatred. Rogojin himself, in his confession to Muishkin during their vigil beside the body, describes how he had carried the knife for some time, how he had taken it from a locked drawer at three in the morning, and how the blade entered only a couple of inches, producing almost no blood—an internal hemorrhage straight to the heart . The scene is saturated with the language of the forbidden: the two men lock the door, speak in whispers, and arrange the body under oilcloth and a sheet with jars of disinfectant, as if trying to contain the fact of the killing itself . Rogojin's act is the starkest possible negation of the commandment, and the novel does not mitigate it: he is convicted and sentenced to fifteen years of hard labor in Siberia . Yet the narrative also insists that the commandment's violation does not restore moral clarity. The prince, sitting beside the murderer through the night, strokes his hair and cheeks, weeping onto his face, and when the police break in, they find Muishkin himself in a state of idiocy, unable to recognize anyone . The commandment has been broken, but the breaker and the witness are both destroyed.

The Theological Context: Christ, Suffering, and the Limits of the Commandment

The novel repeatedly places the commandment "Thou shalt not kill" within a larger theological framework that questions whether any human institution—church or state—can claim authority over life and death. Muishkin's attack on Roman Catholicism in the Epanchin drawing-room is directly linked to this question: he calls Roman Catholicism "unchristian" and worse than atheism, because it preaches "a disfigured, distorted Christ" and has "seized territories and an earthly throne, and has held them with the sword" . For Muishkin, a church that uses temporal power to coerce or kill has abandoned the very faith it claims to represent. This argument is reinforced by the novel's most powerful visual symbol: Holbein's painting of Christ taken from the cross, which hangs in Rogojin's house. The painting shows a mangled, un-beautified corpse, and Muishkin says that "a man's faith might be ruined by looking at that picture" . Rogojin himself admits that he likes looking at it . The painting confronts the viewer with a death so absolute, so devoid of transcendence, that it seems to make the resurrection impossible—and with it, any guarantee that the commandment against killing is grounded in a divine order. Hippolyte, in his "Necessary Explanation," takes up this same theme: he describes the picture as showing nature as "some huge, implacable, dumb monster" that has crushed a Being worth more than the whole earth . If death is simply a mechanical force, then the commandment against killing rests on nothing but human convention. The novel does not resolve this crisis; it leaves the commandment standing as a broken rule, violated by Rogojin, questioned by Hippolyte, and affirmed only by the prince's helpless tears.