The Phrase Today
"An eye for an eye" is the dominant English idiom for retributive justice - the principle that punishment should match the offense. In casual use it implies vengeance or the poetic justice of suffering what one has inflicted. It appears in arguments about capital punishment, war crimes, and personal conflict: "Don't give me an eye for an eye, give me justice." The phrase has also generated its counter-idiom from Gandhi's famous remark: "An eye for an eye makes the whole world blind."
Biblical Origin
The lex talionis formula appears three times in the Hebrew Bible. The KJV of Exodus 21:24-25 reads: "Eye for eye, tooth for tooth, hand for hand, foot for foot, burning for burning, wound for wound, stripe for stripe." Leviticus 24:20 and Deuteronomy 19:21 repeat the formula. The context in Exodus is a law code governing civil disputes and bodily harm - a framework for what compensation or punishment is proportionate to an injury. The formula sets a ceiling, not a floor: you may not demand more than an equivalent.
The Proportionality Principle
Historians of law emphasize that the lex talionis was a legal advance in its ancient context, not a license for violence. Hammurabi's Code (c. 1750 BCE) contains a similar formula. In societies where insult or injury to a person of lower status might demand no penalty at all, while minor offenses against elites triggered disproportionate punishment, the strict equivalence of eye-for-eye established a remarkable legal equality: the same offense deserves the same response regardless of the social class of victim and offender. The Mosaic law also appears to allow monetary compensation in place of literal physical retaliation, suggesting the formula was often a statement of principle rather than a requirement for literal bodily execution.
Jesus's Counter-Principle
The phrase became the subject of one of the most famous antitheses in the Sermon on the Mount. Matthew 5:38-39 (KJV): "Ye have heard that it hath been said, An eye for an eye, and a tooth for a tooth: but I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also." This pairing - eye for an eye versus turn the other cheek - created one of the foundational ethical oppositions in Western moral thought, staging a debate between strict justice and active nonresistance that has occupied philosophers, theologians, and activists ever since.
Semantic Drift
In modern usage, "eye for an eye" primarily connotes vengeance rather than legal proportionality. The original function as a limiter of excess vengeance - you may not demand more than equivalence - has been largely lost. The phrase is now most often used by those who want to justify retribution ("I believe in eye for an eye") or criticize it (Gandhi's reductio), rather than by those defending proportional legal reasoning. The legal concept has been renamed in jurisprudence as the proportionality principle, while the biblical phrase retains its emotional, often visceral connotation.
Historical Usage
Coverdale's 1535 rendering introduced the phrase to English, and it appeared in all subsequent major translations. The KJV's rendering cemented it. In English legal history, the phrase was invoked in debates about criminal punishment from the Reformation onward. Enlightenment thinkers including Cesare Beccaria (On Crimes and Punishments, 1764) argued against lex talionis as barbaric and in favor of deterrence-based rather than retributive punishment. The phrase thus became a contested touchstone in the history of Western criminal philosophy.
Cross-Linguistic Equivalents
The formula lex talionis (Latin: law of retaliation) is the scholarly term used across languages. Most European languages have a direct equivalent derived from their own biblical translations: German Auge um Auge, Zahn um Zahn, French œil pour œil, dent pour dent, Spanish ojo por ojo, diente por diente, Italian occhio per occhio, dente per dente. The formula is universally recognized across cultures that share the Abrahamic legal heritage. In Islamic law, qisas (the principle of equivalent retaliation in cases of bodily harm) covers similar ground.
Gandhi and the Counter-Tradition
"An eye for an eye makes the whole world blind" is widely attributed to Mahatma Gandhi, though the exact source in his writings is uncertain. Whether authentically Gandhi's or not, the aphorism perfectly crystallizes the critique of the lex talionis: unlimited cycles of equivalent retaliation produce total loss. This counter-proverb has become as culturally influential as the original in English, and the two are frequently cited together as a debate between justice and mercy, realism and idealism, Old Testament law and New Testament ethic.
Misconceptions
The dominant misconception is that the formula mandated literal physical retaliation. In practice it likely served as a statement of legal principle allowing monetary compensation, as later rabbinic interpretation confirms. A second misconception is that Jesus was abolishing Mosaic law with his "turn the other cheek" teaching; most scholars argue he was intensifying or radicalizing it, not canceling it. Third, many assume the formula is uniquely Mosaic; in fact the same principle appears in Hammurabi's Code, Sumerian law, and other ancient Near Eastern legal systems, suggesting it was a widespread legal reform concept rather than a distinctive Israelite innovation.