Catechism of the Council of Trent: No Murder
‸THE FIFTH COMMANDMENT : "Thou shalt not kill"
Importance Of Instruction On This Commandment
The great happiness proposed to the peacemakers, of being called the children of God, should prove a powerful incentive to the pastor to explain to the faithful with care and accuracy the obligations imposed by this Commandment. No means more efficacious can be adopted to promote peace among mankind, than the proper explanation of this Commandment and its holy and due observance by all. Then might we hope that men, united in the strictest bonds of union, would live in perfect peace and concord.
The necessity of explaining this Commandment is proved from the following. Immediately after the earth was overwhelmed in universal deluge, this was the first prohibition made by God to man. I will require the blood of your lives, He said, at the hand of every beast and at the hand of man. In the next place, among the precepts of the Old Law expounded by our Lord, this Commandment was mentioned first by Him; concerning which it is written in the Gospel of St. Matthew: It has been said thou shalt not kill, etc.
The faithful, on their part, should hear with willing attention the explanation of this Commandment, since its purpose is to protect the life of each one. These words, Thou shalt not kill, emphatically forbid homicide; and they should be heard by all with the same pleasure as if God, expressly naming each individual, were to prohibit injury to be offered him under a threat of the divine anger and the heaviest chastisements. As, then, the announcement of this Commandment must be heard with pleasure, so also should the avoidance of the sin which it forbids give pleasure.
Two Parts Of This Commandment
In the explanation of this Commandment the Lord points out its twofold obligation. The one is prohibitory and forbids us to kill; the other is mandatory and commands us to cherish sentiments of charity, concord and friendship towards our enemies, to have peace with all men, and finally, to endure with patience every inconvenience.
The Prohibitory Part of this Commandment
Exceptions: The Killing Of Animals
With regard to the prohibitory part, it should first be taught what kinds of killing are not forbidden by this Commandment. It is not prohibited to kill animals; for if God permits man to eat them, it is also lawful to kill them. When, says St. Augustine, we hear the words, "Thou shalt not kill," we do not understand this of the fruits of the earth, which are insensible, nor of irrational animals, which form no part of human society.
Execution Of Criminals
Another kind of lawful slaying belongs to the civil authorities, to whom is entrusted power of life and death, by the legal and judicious exercise of which they punish the guilty and protect the innocent. The just use of this power, far from involving the crime of murder, is an act of paramount obedience to this Commandment which prohibits murder. The end of the Commandment is the preservation and security of human life. Now the punishments inflicted by the civil authority, which is the legitimate avenger of crime, naturally tend to this end, since they give security to life by repressing outrage and violence. Hence these words of David: In the morning I put to death all the wicked of the land, that I might cut off all the workers of iniquity from the city of the Lord.
Killing In A Just War
In like manner, the soldier is guiltless who, actuated not by motives of ambition or cruelty, but by a pure desire of serving the interests of his country, takes away the life of an enemy in a just war.
Furthermore, there are on record instances of carnage executed by the special command of God. The sons of Levi, who put to death so many thousands in one day, were guilty of no sin; when the slaughter had ceased, they were addressed by Moses in these words: You have consecrated your hands this day to the Lord.
Killing By Accident
Again, death caused, not by intent or design, but by accident, is not murder. He that killeth his neighbour ignorantly, says the book of Deuteronomy, and who is proved to have had no hatred against him yesterday and the day before, but to have gone with him to the wood to hew wood, and in cutting down the tree the axe slipt out of his hand, and the iron slipping from the handle struck his friend and killed him, shall live. Such accidental deaths, because inflicted without intent or design, involve no guilt whatever, and this is confirmed by the words of St. Augustine: God forbid that what we do for a good and lawful end shall be imputed to us, if, contrary to our intention, evil thereby befall any one.
There are, however, two cases in which guilt attaches (to accidental death). The first case is when death results from an unlawful act; when, for instance, a person kicks or strikes a woman in a state of pregnancy, and abortion follows. The consequence, it is true, may not have been intended, but this does not exculpate the offender, because the act of striking a pregnant woman is in itself unlawful. The other case is when death is caused by negligence, carelessness or want of due precaution.
Killing In Self-Defence
If a man kill another in self-defence, having used every means consistent with his own safety to avoid the infliction of death, he evidently does not violate this Commandment.
Negative Part Of This Commandment Forbids Murder And Suicide
The above are the cases in which life may be taken without violating this Commandment; and with these exceptions all other killing is forbidden, whether we consider the person who kills, the person killed, or the means used to kill.
As to the person who kills, the Commandment recognises no exception whatever, be he rich or powerful, master or parent. All, without exception or distinction, are forbidden to kill.
With regard to the person killed, the law extends to all. There is no individual, however humble or lowly his condition, whose life is not shielded by this law.
It also forbids suicide. No man possesses such power over his own life as to be at liberty to put himself to death. Hence we find that the Commandment does not say: Thou shalt not kill another, but simply: Thou shalt not kill.
Finally, if we consider the numerous means by which murder may be committed, the law admits of no exception. Not only does it forbid to take away the life of another by laying violent hands on him, by means of a sword, a stone, a stick, a halter, or by administering poison; but also strictly prohibits the accomplishment of the death of another by counsel, assistance, help or any other means whatever.
Sinful Anger Is Also Forbidden By The Fifth Commandment
The Jews, with singular dullness of apprehension, thought that to abstain from taking life with their own hands was enough to satisfy the obligation imposed by this Commandment. But the Christian, instructed in the interpretation of Christ, has learned that the precept is spiritual, and that it commands us not only to keep our hands unstained, but our hearts pure and undefiled; hence what the Jews regarded as quite sufficient, is not sufficient at all. For the Gospel has taught that it is unlawful even to be angry with anyone: But I say to you that whosoever is angry with his brother, shall be in danger of the judgment. And whosoever shall say to his brother, "Raca," shall be in danger of the council. And whosoever shall say, "Thou fool," shall be in danger of hell fire. From these words it clearly follows that he who is angry with his brother is not free from sin, even though he conceals his resentment; that he who gives indication of his wrath sins grievously; and that he who does not hesitate to treat another with harshness, and to utter contumelious reproaches against him, sins still more grievously.
This, however, is to be understood of cases in which no just cause of anger exists. God and His laws permit us to be angry when we chastise the faults of those who are subject to us. For the anger of a Christian should spring from the Holy Spirit and not from carnal impulse, seeing that we should be temples of the Holy Ghost, in which Jesus Christ may dwell.
Our Lord has left us many other lessons of instruction with regard to the perfect observance of this law, such as Not to resist evil; but if one strike thee on thy right cheek, turn to him also the other. And if a man will contend with thee in judgment, and take away thy coat, let go thy cloak also unto him; and whosoever will force thee one mile, go with him two.