Robert Reymond has a very helpful section on the permanency of the moral law of God for all Christians. The moral law (lex moralis) was given through special revelation to Moses on Mount Sinai. Its more common name is the Ten Commandments or the Ten Words. The moral law reflects the very moral character of God and therefore has a continual validity in the life of the Christian. Therefore, the usefulness of the law remains today. Jesus himself argued for the continuing validity of the law of God (particularly the Ten Commandments) in Matthew 5:17-19:
Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen; will by any means disappear from the Law until everything is accomplished. Anyone who breaks one of the least of these commandments and teaches others to do the same will be called least in the kingdom of heaven, but whoever practices and teaches these commands will be called great in the kingdom of heaven.
Reymond provides various references from the New Testament where the NT authors allude to or directly reference the Ten Commandments.
FIRST THREE COMMANDMENTS: No Other Gods; Do not Make an Idol; Do not Take the Lord’s Name in Vain
Romans 1:21-30 For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened. Although they claimed to be wise, they became fools and exchanged the glory of the immortal God for images made to look like mortal man and birds and animals and reptiles. Therefore God gave them over in the sinful desires of their hearts to sexual impurity for the degrading of their bodies with one another. They exchanged the truth of God for a lie, and worshiped and served created things rather than the Creator-- who is forever praised. Amen. Because of this, God gave them over to shameful lusts. Even their women exchanged natural relations for unnatural ones. In the same way the men also abandoned natural relations with women and were inflamed with lust for one another. Men committed indecent acts with other men, and received in themselves the due penalty for their perversion. Furthermore, since they did not think it worthwhile to retain the knowledge of God, he gave them over to a depraved mind; to do what ought not to be done. They have become filled with every kind of wickedness, evil, greed and depravity. They are full of envy, murder, strife, deceit and malice. They are gossips, slanderers, God-haters, insolent, arrogant and boastful; they invent ways of doing evil; they disobey their parents
Romans 2:22 You who say that people should not commit adultery, do you commit adultery? You who abhor idols, do you rob temples?
1 Corinthians 6:9 Do you not know that the wicked will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor male prostitutes nor homosexual offenders.
Ephesians 5:5 For of this you can be sure: No immoral, impure or greedy person-- such a man is an idolater-- has any inheritance in the kingdom of Christ and of God.
Colossians 3:5 Put to death, therefore, whatever belongs to your earthly nature: sexual immorality, impurity, lust, evil desires and greed, which is idolatry.
James 2:19 You believe that there is one God. Good! Even the demons believe that-- and shudder.
Revelation 21:7 He who overcomes will inherit all this, and I will be his God and he will be my son.
FOURTH COMMANDMENT: Remember the Sabbath
Acts 20:7 On the first day of the week we came together to break bread. Paul spoke to the people and, because he intended to leave the next day, kept on talking until midnight.
1 Corinthians 16:2 On the first day of every week, each one of you should set aside a sum of money in keeping with his income, saving it up, so that when I come no collections will have to be made.
Revelation 1:10 On the Lord's Day I was in the Spirit, and I heard behind me a loud voice like a trumpet,
FIFTH COMMANDMENT: Honor Your Parents
Romans 1:30 slanderers, God-haters, insolent, arrogant and boastful; they invent ways of doing evil; they disobey their parents.
Ephesians 6:2-3 “Honor your father and mother"-- which is the first commandment with a promise -- "that it may go well with you and that you may enjoy long life on the earth."
Colossians 3:20 Children, obey your parents in everything, for this pleases the Lord.
1 Timothy 1:9 We also know that law is made not for the righteous but for lawbreakers and rebels, the ungodly and sinful, the unholy and irreligious; for those who kill their fathers or mothers, for murderers.
SIXTH COMMANDMENT: Do not Murder
Romans 1:29 They were filled with all manner of unrighteousness, evil, covetousness, malice. They are full of envy, murder, strife, deceit, maliciousness. They are gossips.
1 Timothy 1:9-10 Understanding this, that the law is not laid down for the just but for the lawless and disobedient, for the ungodly and sinners, for the unholy and profane, for those who strike their fathers and mothers, for murderers, 10 the sexually immoral, men who practice homosexuality, enslavers,1 liars, perjurers, and whatever else is contrary to sound2 doctrine.
James 2:11 For he who said, "Do not commit adultery," also said, "Do not murder." If you do not commit adultery but do murder, you have become a transgressor of the law.
1 John 3:15 Everyone who hates his brother is a murderer, and you know that no murderer has eternal life abiding in him.
SEVENTH COMMANDMENT: Do not Commit Adultery
Romans 2:22 You who say that one must not commit adultery, do you commit adultery? You who abhor idols, do you rob temples?
1 Corinthians 6:9 Do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived: neither the sexually immoral, nor idolaters, nor adulterers, nor men who practice homosexuality.
Ephesians 5:3 But sexual immorality and all impurity or covetousness must not even be named among you, as is proper among saints.
1 Thessalonians 4:3 For this is the will of God, your sanctification: that you abstain from sexual immorality.
1 Timothy 1:10 The sexually immoral, men who practice homosexuality, enslavers, liars, perjurers, and whatever else is contrary to sound doctrine.
James 2:11 For he who said, "Do not commit adultery," also said, "Do not murder." If you do not commit adultery but do murder, you have become a transgressor of the law.
EIGHT COMMANDMENT: Do not Steal
1 Corinthians 6:10 Or thieves, nor the greedy, nor drunkards, nor revilers, nor swindlers will inherit the kingdom of God.
Ephesians 4:28 Let the thief no longer steal, but rather let him labor, doing honest work with his own hands, so that he may have something to share with anyone in need.
1 Timothy 1:10 The sexually immoral, men who practice homosexuality, enslavers, liars, perjurers, and whatever else is contrary to sound doctrine.
NINTH COMMANDMENT: Do not Bear False Witness
Ephesians 4:25 Therefore, having put away falsehood, let each one of you speak the truth with his neighbor, for we are members one of another.
Colossians 3:9 Do not lie to one another, seeing that you have put off the old self1 with its practices.
1 Timothy 1:10 The sexually immoral, men who practice homosexuality, enslavers, liars, perjurers, and whatever else is contrary to sound doctrine.
TENTH COMMANDMENT: Do not Covet
Romans 1:29 They were filled with all manner of unrighteousness, evil, covetousness, malice. They are full of envy, murder, strife, deceit, maliciousness. They are gossips.
Romans 7:7-8 What then shall we say? That the law is sin? By no means! Yet if it had not been for the law, I would not have known sin. I would not have known what it is to covet if the law had not said, "You shall not covet." But sin, seizing an opportunity through the commandment, produced in me all kinds of covetousness. Apart from the law, sin lies dead.
Galatians 5:26 Let us not become conceited, provoking one another, envying one another.
Ephesians 5:5 For you may be sure of this, that everyone who is sexually immoral or impure, or who is covetous (that is, an idolater), has no inheritance in the kingdom of Christ and God.
Colossians 3:5 Put to death therefore what is earthly in you: sexual immorality, impurity, passion, evil desire, and covetousness, which is idolatry.
Hebrews 13:5 Keep your life free from love of money, and be content with what you have, for he has said, "I will never leave you nor forsake you."
Reymond concurs with the Westminster Confession which writes, “The moral law doth for ever bind all, as well justified persons as others, to the obedience thereof; and that, not only in regard of the matter contained in it, but also in respect of the authority of God, the Creator, who gave it. Neither doth Christ, in the Gospel, any way dissolve, but much strengthen this obligation” (19.5). So if Scripture seems clear that the moral law has abiding worth what then is its relationship to the Christian? How does the law of God relate to the believer? And an even more difficult question, how does the law relate to unbelievers? Well, until another time…
Robert L. Reymond,
A New Systematic Theology of the Christian Faith (Nashville, TN: Thomas Nelson, 1998), 775.