If pleasure and pain are the motors of sensitive beings, if the invisible lawgiver of humanity has decreed rewards and punishments as one of the motives to impel men to even their noblest endeavours, the inexact distribution of these motives will give rise to that contradiction, as little noticed as it is of common occurrence, namely, that the laws punish crimes which are entirely of their own creation. If an equal penalty is attached to two crimes of unequal injury to society, the greater crime of the two, if it promise a greater advantage than the other, will have no stronger motive in restraint of its perpetration.[197] Whoever, for example, sees the same punishment of death decreed for the man who kills a pheasant and the man who slays his fellow or falsifies an important document, will draw no distinction between such crimes; and thus moral sentiments, the product only of many ages and of much bloodshed, the slowest and most difficult attainment of the human mind, dependent, it has been thought, on the aid of the most sublime motives and on a parade of the gravest formalities, will be destroyed and lost.
Or to take a stronger case. A deserter from the ranks escapes to his home, breaks into it at night, robs an infirm father of all the savings he has provided for his old age, and in a struggle for their possession so injures him that he dies. Must the law disclaim all indignation, all resentment, in the punishment it inflicts, and say to such a ruffian that it only deals hard with him in order to warn others by his example, and with the pious hope of making a good man of him in the future? If resentment is ever just, is it wrong to give it public expression? If it is natural and right in private life, why should it be a matter of shame in public life? If there is such a thing as just anger for a single man, does it become unjust when distributed among a million?