But what is to be said to the general law of retribution in kind? Our Lord has forbidden a Christian, in his own case, to exact it. But it does not follow that it was unjust, since Christ plainly means to instruct private persons not to exact their rights, whereas the magistrate continues to be “a revenger to execute justice.” And, as St. Augustine argued shrewdly, “this command was not given for exciting the fires of hatred, but to restrain them. For who would easily be satisfied with repaying as much injury as he received? Do we not see men slightly hurt athirst for slaughter and blood?... Upon this immoderate and unjust vengeance, the law imposed a just limit, not that what was quenched might be kindled, but that what was burning might not spread.” (Cont. Faust, xix. 25.) It is also to be observed that by no other precept were the Jews more clearly led to a morality still higher than it prescribed. Their attention was first drawn to the fact that a compensation in money was nowhere forbidden, as in the case of murder (Num. xxxv. 31). Then they went on to argue that such compensation must have been intended, because its literal observance teemed with difficulties. If an eye were injured but not destroyed, who would undertake to inflict an equivalent hurt? What if a blind man destroyed an eye? Would it be reasonable to quench utterly the sight of a one-eyed man who had only destroyed one-half of the vision of his neighbour? Should the right hand of a painter, by which he maintains his family, be forfeited for that of a singer who lives by his voice? Would not the cold and premeditated operation inflict far greater mental and even physical suffering than a sudden wound received in a moment of excitement? By all these considerations, drawn from the very principle which underlay the precept, they learned to relax its pressure in actual life. The law was already their schoolmaster, to lead them beyond itself (_vide_ Kalisch _in loco_). Lastly, there is the question of injury to the person, wrought by cattle. It is clearly to deepen the sense of reverence for human life, that not only must the ox which kills a man be slain, but his flesh may not be eaten; thus carrying further the early aphorism “at the hand of every beast will I require ... your blood” (Gen. ix. 5). This motive, however, does not betray the lawgiver into injustice: “the owner of the ox shall be quit”; the loss of his beast is his sufficient penalty. But if its evil temper has been previously observed, and he has been warned, then his recklessness amounts to blood-guiltiness, and he must die, or else pay whatever ransom is laid upon him. This last clause recognises the distinction between his guilt and that of a deliberate man-slayer, for whose crime the law distinctly prohibited a composition (Num. xxxv. 31).