The mind of man offers more resistance to violence and to extreme but brief pains than it does to time and to incessant weariness; for whilst it can, so to speak, gather itself together for a moment to repel the former, its vigorous elasticity is insufficient to resist the long and repeated action of the latter. In the case of capital punishment, each example presented of it is all that a single crime affords; in penal servitude for life, a single crime serves to present numerous and lasting warnings. And if it be important that the power of the laws should often be witnessed, there ought to be no long intervals between the examples of the death penalty; but this would presuppose the frequency of crimes, so that, to render the punishment effective, it must not make on men all the impression that it ought to make, in other words, it must be useful and not useful at the same time. And should it be objected that perpetual servitude is as painful as death, and therefore equally cruel, I will reply, that, taking into consideration all the unhappy moments of servitude, it will perhaps be even more painful than death; but whilst these moments are spread over the whole of a lifetime, death exercises all its force in a single moment. There is also this advantage in penal servitude, that it has more terrors for him who sees it than for him who suffers it, for the former thinks of the whole sum-total of unhappy moments, whilst the latter, by the unhappiness of the present moment, has his thoughts diverted from that which is to come. All evils are magnified in imagination, and every sufferer finds resources and consolations unknown to and unbelieved in by spectators, who substitute their own sensibility for the hardened soul of a criminal.
A cruelty consecrated among most nations by custom is the torture of the accused during his trial, on the pretext of compelling him to confess his crime, of clearing up contradictions in his statements, of discovering his accomplices, of purging him in some metaphysical and incomprehensible way from infamy, or finally of finding out other crimes of which he may possibly be guilty, but of which he is not accused.
These are some of the difficulties of the subject, which teach us the necessity of constant open-mindedness with regard to all ideas or practices connected with criminal law. But, would we further examine our established notions, we should consider a statement from Hobbes which goes to the very root of the theory of punishment.