Although this commandment to Israel seems quite straightforward, like all the laws, it requires further enlightenment from the Bible as a whole. Quakers would use this commandment to say that going to war is sin—when even God commanded Israel to destroy their enemies. Those who oppose the death penalty would use this verse to foster their cause—denying what other Scriptures plainly teach. Even animal rights activists take its meaning to an extreme, claiming it applies to all killing—ignoring all of the sacrifices God commanded Israel to make and even the teachings of the New Testament. On several occasions God ordered certain people killed for breaking His law or for rebellion against His authority. Israel’s kings were given the authority and power to execute people for various transgressions. Even in the New Testament, which many people claim did away with capital punishment, we see God striking people dead for various reasons. However, most cases of men killing other men were forbidden by this law and were to be dealt with severely, There were also exceptions made to this law, such as in the case of manslaughter, or a man protecting his home. Every act of killing required careful judgment by the people of God before the murderer was put to death.

Exo 20:13 Thou shalt not kill.

1 Sam 15:2 Thus saith the LORD of hosts, I remember that which Amalek did to Israel, how he laid wait for him in the way, when he came up from Egypt.
3 Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass.

Gen 9:6 Whoso sheddeth man's blood, by man shall his blood be shed: for in the image of God made he man.

Rom 13:1 Let every soul be subject unto the higher powers. For there is no power but of God: the powers that be are ordained of God.
2 Whosoever therefore resisteth the power, resisteth the ordinance of God: and they that resist shall receive to themselves damnation.
3 For rulers are not a terror to good works, but to the evil. Wilt thou then not be afraid of the power? do that which is good, and thou shalt have praise of the same:
4 For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain: for he is the minister of God, a revenger to execute wrath upon him that doeth evil.

1 Tim 4:3 Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.
4 For every creature of God is good, and nothing to be refused, if it be received with thanksgiving:

Acts 5:1 But a certain man named Ananias, with Sapphira his wife, sold a possession,
2 And kept back part of the price, his wife also being privy to it, and brought a certain part, and laid it at the apostles' feet.
3 But Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land?
4 Whiles it remained, was it not thine own? and after it was sold, was it not in thine own power? why hast thou conceived this thing in thine heart? thou hast not lied unto men, but unto God.
5 And Ananias hearing these words fell down, and gave up the ghost: and great fear came on all them that heard these things.
6 And the young men arose, wound him up, and carried him out, and buried him.
7 And it was about the space of three hours after, when his wife, not knowing what was done, came in.
8 And Peter answered unto her, Tell me whether ye sold the land for so much? And she said, Yea, for so much.
9 Then Peter said unto her, How is it that ye have agreed together to tempt the Spirit of the Lord? behold, the feet of them which have buried thy husband are at the door, and shall carry thee out.
10 Then fell she down straightway at his feet, and yielded up the ghost: and the young men came in, and found her dead, and, carrying her forth, buried her by her husband.

Acts 12:21 And upon a set day Herod, arrayed in royal apparel, sat upon his throne, and made an oration unto them.
22 And the people gave a shout, saying, It is the voice of a god, and not of a man.
23 And immediately the angel of the Lord smote him, because he gave not God the glory: and he was eaten of worms, and gave up the ghost.

Num 35:15 These six cities shall be a refuge, both for the children of Israel, and for the stranger, and for the sojourner among them: that every one that killeth any person unawares may flee thither.
16 And if he smite him with an instrument of iron, so that he die, he is a murderer: the murderer shall surely be put to death.
17 And if he smite him with throwing a stone, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death.
18 Or if he smite him with an hand weapon of wood, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death.
19 The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him.
20 But if he thrust him of hatred, or hurl at him by laying of wait, that he die;
21 Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him.
22 But if he thrust him suddenly without enmity, or have cast upon him any thing without laying of wait,
23 Or with any stone, wherewith a man may die, seeing him not, and cast it upon him, that he die, and was not his enemy, neither sought his harm:
24 Then the congregation shall judge between the slayer and the revenger of blood according to these judgments:
25 And the congregation shall deliver the slayer out of the hand of the revenger of blood, and the congregation shall restore him to the city of his refuge, whither he was fled: and he shall abide in it unto the death of the high priest, which was anointed with the holy oil.

Exo 22:2 If a thief be found breaking up, and be smitten that he die, there shall no blood be shed for him.
3 If the sun be risen upon him, there shall be blood shed for him; for he should make full restitution; if he have nothing, then he shall be sold for his theft.

Jesus expanded upon the moral teaching behind this law when He gave His Sermon on the Mount. He taught that sin is not just an outward act that someone commits; but that sin is spawned in the wicked hearts of men. That is why the judgment between murder and manslaughter carried different penalties. The sinful act was premeditated in the murderer's heart, the other was accidental. Sin is not like some disease or infection we catch from being in the world; but sin is bred and born in the hearts of sinners. If there were no sinners, there would be no sin. Therefore, when our feelings toward someone are hateful or vengeful, we have already murdered them in our heart. Jesus went on to teach that any kind of disparaging thoughts or words about someone was also sin. This commandment covered any kind of hateful, spiteful, vengeful, or discriminatory thoughts, words, or actions against a person’s life, property, or character.

Matt 5:21 Ye have heard that it was said by them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment:
22 But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire.

1 John 3:15 Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.

Matt 15:18 But those things which proceed out of the mouth come forth from the heart; and they defile the man.
19 For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:

James 2:8 If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well:
9 But if ye have respect to persons, ye commit sin, and are convinced of the law as transgressors.

What then are the implications of this commandment toward those who are in Christ? First of all, the law is like a thermometer that measures our spiritual condition. Jesus gave a new commandment to His disciples— “That ye love one another; as I have loved you, that ye also love one another.” Now Jesus was not speaking of some external law that He demanded them to keep, but an internal principle that was one of the fruits of the Holy Spirit’s indwelling. Natural men do not have the ability to unselfishly love anyone. Only those in Christ can experience and show forth agape love, because the Spirit of God dwells within them. This proof of the Spirit’s presence in God’s children would be so evident that Jesus said, “By this shall all men know that ye are my disciples, if ye have love one to another.” Therefore, when we have a hateful attitude toward anyone, it is an indication that all is not well within us. For those who never show forth God’s love and always have a spirit of antagonism toward the children of God, it is because they are not saved. They may profess Christ, but they do not possess Christ. Furthermore, when a child of God begins to have hateful thoughts, it is a sign that they are no longer abiding in Christ, but are walking after the flesh. When a Christian falls from grace they can be a most disagreeable person to be around.

John 13:34 A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another.
35 By this shall all men know that ye are my disciples, if ye have love one to another.

Gal 5:13 For, brethren, ye have been called unto liberty; only use not liberty for an occasion to the flesh, but by love serve one another.
14 For all the law is fulfilled in one word, even in this; Thou shalt love thy neighbour as thyself.
15 But if ye bite and devour one another, take heed that ye be not consumed one of another.
16 This I say then, Walk in the Spirit, and ye shall not fulfill the lust of the flesh.
17 For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.
18 But if ye be led of the Spirit, ye are not under the law.
19 Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness,
20 Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies,
21 Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.
22 But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith,
23 Meekness, temperance: against such there is no law.
24 And they that are Christ's have crucified the flesh with the affections and lusts.
25 If we live in the Spirit, let us also walk in the Spirit.

1 John 2:7 Brethren, I write no new commandment unto you, but an old commandment which ye had from the beginning. The old commandment is the word which ye have heard from the beginning.
8 Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth.
9 He that saith he is in the light, and hateth his brother, is in darkness even until now.
10 He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.
11 But he that hateth his brother is in darkness, and walketh in darkness, and knoweth not whither he goeth, because that darkness hath blinded his eyes.

1 John 3:14 We know that we have passed from death unto life, because we love the brethren. He that loveth not his brother abideth in death.
15 Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.

Matt 7:15 Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.
16 Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?
17 Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.
18 A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.
19 Every tree that bringeth not forth good fruit is hewn down, and cast into the fire.
20 Wherefore by their fruits ye shall know them.

Another way that Christians can break this commandment of grace is by being unmerciful and judgmental. The law of grace demands—that because grace and mercy has been shown to us, we must be merciful to others. Neither must we be condemning or judgmental in our attitudes. God did not make any of us a judge over His children— “There is one lawgiver, who is able to save and to destroy: who art thou that judgest another?” When we put others under the law and judge them for their faults and failures, we kill them, because that is what the law requires. However, by doing so, we bring the judgments of the law upon ourselves, because none of us can satisfy its demands. We only stand before God by His grace and mercy in Christ; and when we put others under the law, we ourselves fall from grace.

Matt 5:7 Blessed are the merciful: for they shall obtain mercy.

Matt 7:1 Judge not, that ye be not judged.
2 For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.
3 And why beholdest thou the mote that is in thy brother's eye, but considerest not the beam that is in thine own eye?
4 Or how wilt thou say to thy brother, Let me pull out the mote out of thine eye; and, behold, a beam is in thine own eye?
5 Thou hypocrite, first cast out the beam out of thine own eye; and then shalt thou see clearly to cast out the mote out of thy brother's eye.

Jam 4:11 Speak not evil one of another, brethren. He that speaketh evil of his brother, and judgeth his brother, speaketh evil of the law, and judgeth the law: but if thou judge the law, thou art not a doer of the law, but a judge.
12 There is one lawgiver, who is able to save and to destroy: who art thou that judgest another?

Matt 18:23 Therefore is the kingdom of heaven likened unto a certain king, which would take account of his servants.
24 And when he had begun to reckon, one was brought unto him, which owed him ten thousand talents.
25 But forasmuch as he had not to pay, his lord commanded him to be sold, and his wife, and children, and all that he had, and payment to be made.
26 The servant therefore fell down, and worshipped him, saying, Lord, have patience with me, and I will pay thee all.
27 Then the lord of that servant was moved with compassion, and loosed him, and forgave him the debt.
28 But the same servant went out, and found one of his fellowservants, which owed him an hundred pence: and he laid hands on him, and took him by the throat, saying, Pay me that thou owest.
29 And his fellowservant fell down at his feet, and besought him, saying, Have patience with me, and I will pay thee all.
30 And he would not: but went and cast him into prison, till he should pay the debt.
31 So when his fellowservants saw what was done, they were very sorry, and came and told unto their lord all that was done.
32 Then his lord, after that he had called him, said unto him, O thou wicked servant, I forgave thee all that debt, because thou desiredst me:
33 Shouldest not thou also have had compassion on thy fellowservant, even as I had pity on thee?
34 And his lord was wroth, and delivered him to the tormentors, till he should pay all that was due unto him.
35 So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.