The author explores the etymological roots of justice, suggesting that the term is historically linked to positive law and authoritative custom.

The author defines the essence of a moral 'wrong' as an act that deserves punishment, whether by law or conscience, distinguishing morality from simple expediency through this penal sanction.

The text examines the persistent human impulse for 'lex talionis' or repayment in kind, noting that while modern law has largely moved past it, the desire for retributive justice remains a natural sentiment.

The author maintains that the distinction between justice and expediency is real and sacred, asserting that justice grounded in utility is the most binding and fundamental part of all morality.

Mill critiques the legal maxim that consent justifies harm, suggesting it is a flawed attempt to resolve the complexities of punishment and an example of how irregular principles of justice are formed.