Many would say "I am no longer under the law, but I am now under the Grace of God".

ROMANS 6 : 14 -15 NKJV

14 For sin shall not have dominion over you, for you are not under law but under grace.

From Slaves of Sin to Slaves of God

15 What then? Shall we sin because we are not under law but under grace? Certainly not!

Many also do not understand the grace of God. The grace of God is the power of God for a believer to overcome sin and walk in the Holiness of God. It is not a title given to a believer relieving them of all of the consequences of their sin. Verse 15 says that it is not okay to sin. In fact, if one indeed sins, then that one is not under grace but will be judged according to the law. Sin is deliberate disobedience to God.

MATTHEW 5, 6, 7. NKJV

Matthew 5New King James Version (NKJV)

The Beatitudes

5 And seeing the multitudes, He went up on a mountain, and when He was seated His disciples came to Him. 2 Then He opened His mouth and taught them, saying:

3 “Blessed are the poor in spirit,
    For theirs is the kingdom of heaven.
4 Blessed are those who mourn,
    For they shall be comforted.
5 Blessed are the meek,
    For they shall inherit the earth.
6 Blessed are those who hunger and thirst for righteousness,
    For they shall be filled.
7 Blessed are the merciful,
    For they shall obtain mercy.
8 Blessed are the pure in heart,
    For they shall see God.
9 Blessed are the peacemakers,
    For they shall be called sons of God.
10 Blessed are those who are persecuted for righteousness’ sake,
    For theirs is the kingdom of heaven.

11 “Blessed are you when they revile and persecute you, and say all kinds of evil against you falsely for My sake. 12 Rejoice and be exceedingly glad, for great is your reward in heaven, for so they persecuted the prophets who were before you.

Believers Are Salt and Light

13 “You are the salt of the earth; but if the salt loses its flavor, how shall it be seasoned? It is then good for nothing but to be thrown out and trampled underfoot by men.

14 “You are the light of the world. A city that is set on a hill cannot be hidden. 15 Nor do they light a lamp and put it under a basket, but on a lampstand, and it gives light to all who are in the house. 16 Let your light so shine before men, that they may see your good works and glorify your Father in heaven.

Christ Fulfills the Law

17 “Do not think that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill. 18 For assuredly, I say to you, till heaven and earth pass away, one jot or one tittle will by no means pass from the law till all is fulfilled. 19 Whoever therefore breaks one of the least of these commandments, and teaches men so, shall be called least in the kingdom of heaven; but whoever does and teaches them, he shall be called great in the kingdom of heaven. 20 For I say to you, that unless your righteousness exceeds the righteousness of the scribes and Pharisees, you will by no means enter the kingdom of heaven.

Murder Begins in the Heart

21 “You have heard that it was said to those of old, ‘You shall not murder, and whoever murders will be in danger of the judgment.’ 22 But I say to you that whoever is angry with his brother without a cause shall be in danger of the judgment. And whoever says to his brother, ‘Raca!’ shall be in danger of the council. But whoever says, ‘You fool!’ shall be in danger of hell fire. 23 Therefore if you bring your gift to the altar, and there remember that your brother has something against you, 24 leave your gift there before the altar, and go your way. First be reconciled to your brother, and then come and offer your gift. 25 Agree with your adversary quickly, while you are on the way with him, lest your adversary deliver you to the judge, the judge hand you over to the officer, and you be thrown into prison. 26 Assuredly, I say to you, you will by no means get out of there till you have paid the last penny.

Adultery in the Heart

27 “You have heard that it was said to those of old, ‘You shall not commit adultery.’ 28 But I say to you that whoever looks at a woman to lust for her has already committed adultery with her in his heart. 29 If your right eye causes you to sin, pluck it out and cast it from you; for it is more profitable for you that one of your members perish, than for your whole body to be cast into hell. 30 And if your right hand causes you to sin, cut it off and cast it from you; for it is more profitable for you that one of your members perish, than for your whole body to be cast into hell.

Marriage Is Sacred and Binding

31 “Furthermore it has been said, ‘Whoever divorces his wife, let him give her a certificate of divorce.’ 32 But I say to you that whoever divorces his wife for any reason except sexual immorality causes her to commit adultery; and whoever marries a woman who is divorced commits adultery.

Jesus Forbids Oaths

33 “Again you have heard that it was said to those of old, ‘You shall not swear falsely, but shall perform your oaths to the Lord.’ 34 But I say to you, do not swear at all: neither by heaven, for it is God’s throne; 35 nor by the earth, for it is His footstool; nor by Jerusalem, for it is the city of the great King. 36 Nor shall you swear by your head, because you cannot make one hair white or black. 37 But let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ For whatever is more than these is from the evil one.

Go the Second Mile

38 “You have heard that it was said, ‘An eye for an eye and a tooth for a tooth.’ 39 But I tell you not to resist an evil person. But whoever slaps you on your right cheek, turn the other to him also. 40 If anyone wants to sue you and take away your tunic, let him have your cloak also.41 And whoever compels you to go one mile, go with him two. 42 Give to him who asks you, and from him who wants to borrow from you do not turn away.

Love Your Enemies

43 “You have heard that it was said, ‘You shall love your neighbor and hate your enemy.’ 44 But I say to you, love your enemies, bless those who curse you, do good to those who hate you, and pray for those who spitefully use you and persecute you, 45 that you may be sons of your Father in heaven; for He makes His sun rise on the evil and on the good, and sends rain on the just and on the unjust. 46 For if you love those who love you, what reward have you? Do not even the tax collectors do the same? 47 And if you greet your brethren only, what do you do more than others? Do not even the tax collectors do so? 48 Therefore you shall be perfect, just as your Father in heaven is perfect.

Do Good to Please God

6 “Take heed that you do not do your charitable deeds before men, to be seen by them. Otherwise you have no reward from your Father in heaven. 2 Therefore, when you do a charitable deed, do not sound a trumpet before you as the hypocrites do in the synagogues and in the streets, that they may have glory from men. Assuredly, I say to you, they have their reward. 3 But when you do a charitable deed, do not let your left hand know what your right hand is doing, 4 that your charitable deed may be in secret; and your Father who sees in secret will Himself reward you openly.

The Model Prayer

5 “And when you pray, you shall not be like the hypocrites. For they love to pray standing in the synagogues and on the corners of the streets, that they may be seen by men. Assuredly, I say to you, they have their reward. 6 But you, when you pray, go into your room, and when you have shut your door, pray to your Father who is in the secret place; and your Father who sees in secret will reward you openly. 7 And when you pray, do not use vain repetitions as the heathen do. For they think that they will be heard for their many words.

8 “Therefore do not be like them. For your Father knows the things you have need of before you ask Him. 9 In this manner, therefore, pray:

Our Father in heaven,
Hallowed be Your name.
10 Your kingdom come.
Your will be done
On earth as it is in heaven.
11 Give us this day our daily bread.
12 And forgive us our debts,
As we forgive our debtors.
13 And do not lead us into temptation,
But deliver us from the evil one.
For Yours is the kingdom and the power and the glory forever. Amen.[c]

14 “For if you forgive men their trespasses, your heavenly Father will also forgive you. 15 But if you do not forgive men their trespasses, neither will your Father forgive your trespasses.

Fasting to Be Seen Only by God

16 “Moreover, when you fast, do not be like the hypocrites, with a sad countenance. For they disfigure their faces that they may appear to men to be fasting. Assuredly, I say to you, they have their reward. 17 But you, when you fast, anoint your head and wash your face, 18 so that you do not appear to men to be fasting, but to your Father who is in the secret place; and your Father who sees in secret will reward you openly.

Lay Up Treasures in Heaven

19 “Do not lay up for yourselves treasures on earth, where moth and rust destroy and where thieves break in and steal; 20 but lay up for yourselves treasures in heaven, where neither moth nor rust destroys and where thieves do not break in and steal. 21 For where your treasure is, there your heart will be also.

The Lamp of the Body

22 “The lamp of the body is the eye. If therefore your eye is good, your whole body will be full of light. 23 But if your eye is bad, your whole body will be full of darkness. If therefore the light that is in you is darkness, how great is that darkness!

You Cannot Serve God and Riches

24 “No one can serve two masters; for either he will hate the one and love the other, or else he will be loyal to the one and despise the other. You cannot serve God and mammon.

Do Not Worry

25 “Therefore I say to you, do not worry about your life, what you will eat or what you will drink; nor about your body, what you will put on. Is not life more than food and the body more than clothing? 26 Look at the birds of the air, for they neither sow nor reap nor gather into barns; yet your heavenly Father feeds them. Are you not of more value than they?27 Which of you by worrying can add one cubit to his stature?

28 “So why do you worry about clothing? Consider the lilies of the field, how they grow: they neither toil nor spin; 29 and yet I say to you that even Solomon in all his glory was not arrayed like one of these. 30 Now if God so clothes the grass of the field, which today is, and tomorrow is thrown into the oven, will He not much more clothe you, O you of little faith?

31 “Therefore do not worry, saying, ‘What shall we eat?’ or ‘What shall we drink?’ or ‘What shall we wear?’ 32 For after all these things the Gentiles seek. For your heavenly Father knows that you need all these things.33 But seek first the kingdom of God and His righteousness, and all these things shall be added to you. 34 Therefore do not worry about tomorrow, for tomorrow will worry about its own things. Sufficient for the day is its own trouble.

Do Not Judge

7 “Judge not, that you be not judged. 2 For with what judgment you judge, you will be judged; and with the measure you use, it will be measured back to you. 3 And why do you look at the speck in your brother’s eye, but do not consider the plank in your own eye? 4 Or how can you say to your brother, ‘Let me remove the speck from your eye’; and look, a plank is in your own eye? 5 Hypocrite! First remove the plank from your own eye, and then you will see clearly to remove the speck from your brother’s eye.

6 “Do not give what is holy to the dogs; nor cast your pearls before swine, lest they trample them under their feet, and turn and tear you in pieces.

Keep Asking, Seeking, Knocking

7 “Ask, and it will be given to you; seek, and you will find; knock, and it will be opened to you. 8 For everyone who asks receives, and he who seeks finds, and to him who knocks it will be opened. 9 Or what man is there among you who, if his son asks for bread, will give him a stone?10 Or if he asks for a fish, will he give him a serpent? 11 If you then, being evil, know how to give good gifts to your children, how much more will your Father who is in heaven give good things to those who ask Him!12 Therefore, whatever you want men to do to you, do also to them, for this is the Law and the Prophets.

The Narrow Way

13 “Enter by the narrow gate; for wide is the gate and broad is the way that leads to destruction, and there are many who go in by it.14 Because narrow is the gate and difficult is the way which leads to life, and there are few who find it.

You Will Know Them by Their Fruits

15 “Beware of false prophets, who come to you in sheep’s clothing, but inwardly they are ravenous wolves. 16 You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? 17 Even so, every good tree bears good fruit, but a bad tree bears bad fruit. 18 A good tree cannot bear bad fruit, nor can a bad tree bear good fruit.19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 Therefore by their fruits you will know them.

I Never Knew You

21 “Not everyone who says to Me, ‘Lord, Lord,’ shall enter the kingdom of heaven, but he who does the will of My Father in heaven. 22 Many will say to Me in that day, ‘Lord, Lord, have we not prophesied in Your name, cast out demons in Your name, and done many wonders in Your name?’ 23 And then I will declare to them, ‘I never knew you; depart from Me, you who practice lawlessness!’

Build on the Rock

24 “Therefore whoever hears these sayings of Mine, and does them, I will liken him to a wise man who built his house on the rock: 25 and the rain descended, the floods came, and the winds blew and beat on that house; and it did not fall, for it was founded on the rock.

26 “But everyone who hears these sayings of Mine, and does not do them, will be like a foolish man who built his house on the sand: 27 and the rain descended, the floods came, and the winds blew and beat on that house; and it fell. And great was its fall.”

28 And so it was, when Jesus had ended these sayings, that the people were astonished at His teaching, 29 for He taught them as one having authority, and not as the scribes.

The above three chapters of Matthew are the "Sermon on The Mount". This sermon is Jesus's instruction for all believers, then, now and those who are to come. I have highlighted some key verses.

Therefore the Law remains, but Christ will fulfill it. How does He fulfill it?

ROMANS 8 : 13 NKJV

13 For if you live according to the flesh you will die; but if by the Spirit you put to death the deeds of the body, you will live.

God gives His Holy Spirit to believers who ask. The Holy Spirit then instructs that believer in the righteousness of God. If then that believer is obedient to the Holy Spirit and remains faithful, that one has salvation. The Holy Spirit will teach believers in the fulfillment of the Law.

1 JOHN 2 : 27 NKJV

27 But the anointing which you have received from Him abides in you, and you do not need that anyone teach you; but as the same anointing teaches you concerning all things, and is true, and is not a lie, and just as it has taught you, you will abide in Him.

20 For I say to you, that unless your righteousness exceeds the righteousness of the scribes and Pharisees, you will by no means enter the kingdom of heaven.

14 “For if you forgive men their trespasses, your heavenly Father will also forgive you. 15 But if you do not forgive men their trespasses, neither will your Father forgive your trespasses.

In the above verses Jesus is clearly saying that there are reasons why believers may not enter the kingdom of heaven.

12 Therefore, whatever you want men to do to you, do also to them, for this is the Law and the Prophets.

In the above verse Jesus is clearly saying that He requires His disciples to fulfill the Law.

In verses 21 -23 Jesus is describing His reaction to those who call themselves believers, who practice lawlessness, at the time when they are being judged by Him. Lawlessness is sin and those who continue in it clearly are cast into Hell. Many live under the false grace which says that they can continue in their sin and it will be covered by The Blood of Jesus Christ. This is a lie.