Law? We don't need no law.

Excellent post, short and to the point. Backsliding and going back under the law doesn't sound like a lot of fun to me. 

I found this long version that says pretty much the same thing. 

The Function of the Law

“I do not set aside the grace of God, for if righteousness could be gained through the law, Christ died for nothing!… All who rely on observing the law are under a curse, for it is written: ‘Cursed is everyone who does not continue to do everything written in the Book of the Law.’

Clearly no one is justified before God by the law, because, ‘The righteous will live by faith.’ The law is not based on faith; on the contrary, ‘The man who does these things will live by them.’ ” (Galatians 2:21; 3:10–12)

A careful reading of the text indicates that Paul is not condemning the law, but the attempt to use the law as a means of being saved. When he says, “the law is not based on faith,” he is saying, “the law (as a means of salvation) is not based on faith.” He never condemns the law in itself. In fact, our first principle was that grace does not abolish the law, it upholds it.

Paul claimed in Romans 3:20, “Therefore no one will be declared righteous in his sight by observing the law; rather, through the law we become conscious of sin.” Again, in Romans 7:7, “I would not have known what sin was, except through the law.” He goes on to say that the law to which he is referring is the one that says, “Thou shalt not covet …”—the Ten Commandments. Paul makes it absolutely clear that it is not the purpose of the law to save anyone. No one is going to be saved because he kept the law.

The law was given to reveal sin. John said that sin is breaking the law: “Everyone who sins breaks the law.” (I John 1:9) In fact, Paul said in Romans 5:13, “… sin is not taken into account where there is no law.” The very fact that there is no sin where there is no law means that when Lucifer rebelled in heaven, there must have been some form of the law present even then, or he would not have been guilty of sin. We must always keep in mind the purpose of God’s law as it was given at Mt. Sinai. It was not given as a measuring stick to show the people how righteous they were. It was given to reveal how sinful they were and how much they needed a Redeemer (grace).

When one stands before the law of God, it points out his sins. “We have all sinned and come short of the glory of God.” (Romans 3:27) Therefore the law condemns us—we are under the law. And since Romans 6:23 tells us “The wages of sin is death,” we are all condemned to die. But that isn’t the end. The moment we recognize our sinfulness, and respond to the Spirit of God with repentance and confession, “He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.” (1 John 1:9)

At that moment we are no longer under the law, which condemns us; but we are under His grace, which forgives us. But just because we are under grace does not mean we are free to disregard the law. Those who knowingly trample upon God’s law without seeking forgiveness are back under the law.


Revelation Now
By Jac Colón

Since “when there is a change in the priesthood, there is necessarily a change in the law as well,” the Mosaic Law is no longer in effect (Heb 7:12). “Moses said” nothing about a priest from the line of Judah but only spoke about “the Levitical priesthood (for under it the people received the law)” (Heb 7:14, 11). For this reason, Jesus from the line of Judah (not Levi) institutes a completely new Melchizedekian priesthood (and so law) by the power of his resurrection (Heb 7:16).

Jesus is our great high priest and we are under the law of love and grace. We are to obey the moral law for what is referred to as the natural law, just like non-believers do.

“For when Gentiles, who do not have the law, by nature do what the law requires, they are a law to themselves, even though they do not have the law” (Romans 2:14).

The Gospel of Jesus Christ frees us from the judgment and the burden of the law. To claim the opposite is to reverse the conclusion of the Jerusalem Council: “Now, therefore, why are you putting God to the test by placing a yoke on the neck of the disciples that neither our fathers nor we have been able to bear?” (Acts 15:11).
Gentiles are saved as Gentiles and fall under the law of Christ, which may be summed up saying: “For the entire law is fulfilled in keeping this one command: “‘Love your neighbor as yourself’” (Gal 5:14).

In line with the OP: "Law...we (believers) don't need no Law"

Romans 5:13 Since believers are no longer “under the law”, of sin and death. Since we have been set free. There is no law to condemn us. Because the law is ended for believers, we no longer need a guardian.

Romans 7:1–6
1Do you not know, brothers (for I am speaking to those who know the law), that the law has authority over a man only as long as he lives? 2For instance, a married woman is bound by law to her husband as long as he lives. But if her husband dies, she is released from the law of marriage. 3So then, if she is joined to another man while her husband is still alive, she is called an adulteress; but if her husband dies, she is free from that law and is not an adulteress, even if she marries another man.

4Therefore, my brothers, you also died to the law through the body of Christ, that you might belong to another, to Him who was raised from the dead, in order that we might bear fruit to God. 5For when we lived according to the flesh, the sinful passions aroused by the law were at work in our bodies, bearing fruit for death. 6But now, having died to what bound us, we have been released from the law, so that we serve in the new way of the Spirit, and not in the old way of the written code.

The Purpose of the Law 

Galatians 3:15-23 Brothers, let me put this in human terms. Even a human covenant, once it is ratified, cannot be canceled or amended. 16The promises were spoken to Abraham and to his seed. The Scripture does not say, “and to seeds,” meaning many, but “and to your seed,” meaning One, who is Christ.

17What I mean is this: The law that came 430 years later does not revoke the covenant previously established by God, so as to nullify the promise. 18For if the inheritance depends on the law, then it no longer depends on a promise; but God freely granted it to Abraham through a promise.

19Why then was the law given? It was added because of transgressions, until the arrival of the seed to whom the promise referred. It was administered through angels by a mediator. 20A mediator is unnecessary, however, for only one party; but God is one.

21Is the law, then, opposed to the promises of God? Certainly not! For if a law had been given that could impart life, then righteousness would certainly have come from the law. 22But the Scripture pronounces all things confined by sin, so that by faith in Jesus Christ the promise might be given to those who believe.

23Before this faith came, we were held in custody under the law, locked up until faith should be revealed. 24So the law became our guardian to lead us to Christ, that we might be justified by faith. 25Now that faith has come, we are no longer under a guardian.