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GALATIANS.3: =
The Law Brings a Curse
10 For as many as are of the works of the law are under the curse; for it is written, “Cursed is everyone who does not continue in all things which are written in the book of the law, to do them.” 11 But that no one is justified by the law in the sight of God is evident, for “the just shall live by faith.” 12 Yet the law is not of faith, but “the man who does them shall live by them.”
13 Christ has redeemed us from the curse of the law, having become a curse for us (for it is written, “Cursed is everyone who hangs on a tree”), 14 that the blessing of Abraham might come upon the Gentiles in Christ Jesus, that we might receive the promise of the Spirit through faith.
The phrase "work of the law" does not have a definitive article in the Greek, so it is literally translated as "work of law", which means that the phrase does refer to a definitive set of laws, such as the Law of Moses, but rather Paul used it as a catch-all phrase to refer to large body of Jewish oral law, traditions, rulings, and fences that exist in the 1st century, which would eventually be recorded in the Mishna. The phrase "work of law" is also used in this way in the Qumran Text 4QMMT.
In Matthew 15:2-3, Jesus was asked why his disciples broke the traditions of the elders and he responded by asking them why they broke the command of God for the sake of their tradition. He went on to say that for the sake of their tradition they made void the Word of God (Matthew 15:6), that they worshiped God in vain because they taught as doctrines the commands of men (Matthew 15:8-9), and that they were hypocrites for setting aside the commands of God in order to establish their own traditions (Mark 7:6-9), so it is important to understand that Jesus criticized the Pharisees for not following the Mosaic Law and for teaching their own traditions instead, which means that we need to be careful not to take something that was against following the laws of men as being against following the Law of our God. I linked a video in my previous post by an ex-Pharisee that does an excellent of giving an overview of the issues that Jesus was facing with the Pharisees. They were even teaching that they had a higher authority than God to interpret Scripture, and this is something Jesus had a problem with.
In Romans 3:27-31, Paul differentiated between a law that was of works, which is works of law, and a law that is of faith, which is God's Law, and he said that our faith upholds God's Law. In Matthew 23:23, Jesus said that faith was one of the weightier matters of the Law, so again God's Law is of faith, and obedience to it is straightforwardly about trusting God to guide us in how to rightly live. So getting back to Galatians 3, man-made works of law are not of faith, but the Book of the Law is of faith, so who rely on works of law are under a curse because they are failing to live by faith in God and are therefore failing to do everything in the Book of the Law.
ROMANS.7: =
Law Cannot Save from Sin
13 Has then what is good become death to me? Certainly not! But sin, that it might appear sin, was producing death in me through what is good, so that sin through the commandment might become exceedingly sinful. 14 For we know that the law is spiritual, but I am carnal, sold under sin. 15 For what I am doing, I do not understand. For what I will to do, that I do not practice; but what I hate, that I do. 16 If, then, I do what I will not to do, I agree with the law that it is good. 17 But now, it is no longer I who do it, but sin that dwells in me. 18 For I know that in me (that is, in my flesh) nothing good dwells; for to will is present with me, but how to perform what is good I do not find. 19 For the good that I will to do, I do not do; but the evil I will not to do, that I practice. 20 Now if I do what I will not to do, it is no longer I who do it, but sin that dwells in me.
21 I find then a law, that evil is present with me, the one who wills to do good. 22 For I delight in the law of God according to the inward man. 23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. 24 O wretched man that I am! Who will deliver me from this body of death? 25 I thank God—through Jesus Christ our Lord!
So then, with the mind I myself serve the law of God, but with the flesh the law of sin.
In Romans 7, it is again important to distinguish which law Paul was talking about. In verses 21-25, he said that he delighted in obeying God's Law and that he served it with his mind, but contrasted that with the law of sin that held him captive that he served with his flesh, so throughout Romans 5-8, we need be careful to determine from the context which of the two laws he is talking about.
1JOHN.4: = 10 In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins. 11 Beloved, if God so loved us, we also ought to love one another.
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The Law or Moses Law shows us to be born inherently sinful/evil/satanic and deserving to be sent to hell by God when we die - the consequence of Adam's Original Sin(ROMANS.5:12, LEV.17:11, HEB.9:22, MATT.5:27-30).
... As for the Jews, no amount of keeping the Law will save them from hell, ie not committing idolatry, murder, adultery, rape, stealing, lying/cheating, etc will not justify them for being saved from hell or salvation = hence, Law vs Grace(= justified by faith in Christ, and not by the keeping of the Law).
IOW, the Law could not save people from hell, only Christ could. That was how Jesus Christ fulfilled the Law, ie He fulfilled what the Law could not fulfill, by being the required sacrificial Lamb of God who was crucified on the Cross, in order to wash away our inborn and outborn sins and to clean and prepare us for the kingdom of heaven.
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P S - At most, the Law can only fulfill a good and long life on earth for good and law-abiding Jews or even Gentiles.(cf; MATT.19:23, ROM.2:10)
The purpose of God revealing our sin was to lead us to repentance and back to obedience to His Law. The Law instructs us how to do what is righteous in accordance with God's righteousness, but no amount of doing what is righteous will ever cause someone to become righteous because the Law was never given for that purpose. Rather, the one and only way that there has ever been to become righteous is by grace through faith, and by the same grace through the same faith we are therefore required to be careful to obey all of God's commands.
God was not acting against His grace when He gave to Law, but rather giving the Law was how God how showed His grace to us. In Psalms 119:29, David asked God to show his grace to him by teaching him to obey His Law. In Titus 2:11-14, it says that our salvation involves being trained by grace to do what is godly, righteous, and good and to refrain from doing what is ungodly and sinful, which is an accurate description of what the Law was given to instruct how to do. In Roman 1:5, we have received grace in order to bring about the obedience that faith requires, so there is no conflict between God's grace and God's Law, as though a house divided against itself could stand. The Law was never given as a means of becoming justified, but as instructions for how those who have been justified should therefore act.