Matthew 5:38 - Ellicott's Commentary On The Whole Bible

An eye for an eye. — Here again the scribes first took their stand on the letter, regardless of the aim and purpose, of the Law, and then expanded it in a wrong direction. As originally given, it was a check on the “wild justice” of revenge. It said, where the equilibrium of right had been disturbed by outrage, that the work of the judge was not to do more than restore the equilibrium, unless, as in the case of theft, some further penalty was necessary for the prevention of crime. It was, in its essence, a limit in both directions. Not less than the “eye for an eye,” for that might lead to connivance in guilt; not more, for that would open a fresh score of wrong. The scribes in their popular casuistry made the rule one not of judicial action only, but of private retaliation; and it was thus made the sanction of the vindictive temper that forgives nothing.