Perhaps one other key point – in God the virtues of justice and charity are identities.
“First Things” published in 2004 an article is entitled: “Capital Punishment: The Case for Justice” by J. Budziszewski, Professor of Government and Philosophy at the University of Texas at Austin (
firstthings.com/ftissues/ft0408/articles/budziszewski.htm).
In “Capital Punishment: The Case for Justice,” Mr. Budziszewski argues that mercy and justice are rationally irreconcilable. Since Mr. B’s reason cannot reconcile a simultaneous co-existence of justice and charity, Mr. B eloquently offers his faith-filled explanation of satisfying the needs of divine retribution by the intervention of the divine surrogate.
However, properly understood, justice and charity illuminated by revelation must be harmonious and never conflicted because all virtues are consonant in the mind of God. The demands of justice are identical to the demands of charity.
Therefore, according to CCC #2267, I interpret the moral justification for capital punishment must be charity toward the criminal. That is, we may kill him only if prudence tells us doing so increases his chance of redemption.
If the finite is to invade the infinite, it can only do so by invitation and on common ground. Jesus Christ provides the invitation that allows us to participate in His kingdom. The common ground, the good news revealed in his words, life, death and resurrection is that, the method of participation in the kingdom is charity. The virtue of charity is common ground with the divine because God has given human beings greater potential to reflect His image in charity than in our pretension of producing His justice. The Book of Job at least tells us that much. Why God has not elected to illuminate mankind on justice, I don’t know. But he has elected to remove the veils on the demands of charity, especially in the NT.