No obligation to justice does force a man to be cruel, or to use the sharpest sentence.
Whatever is worthy to be loved for anything is worthy of preservation. A wise and dispassionate legislator, if any such should ever arise among men, will not condemn to death him who has done or is likely to do more service than injury to society. Blocks and gibbets are the nearest objects with legislators, and their business is never with hopes or with virtues.
The best situation of all, and one frequently utilized, is for jails and prisons to allow volunteer ministers of all faiths to enter prisons and offer their services to the inmates who want them. That way, the religious needs of inmates are met but without government funds being spent.
Prison, dungeons, blessed places where evil is impossible because they are the crossroads of all the evil in the world. One cannot commit evil in hell.