God's law is for unbelievers, not Christians
"We know that the law is good if one uses it properly. We also know that the 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, for the sexually immoral, for those practicing homosexuality, for slave traders and liars and perjurers—and for whatever else is contrary to the sound doctrine .." 1 Timothy 1:8-10
Saying that the law is good if one uses it properly contradicts saying that the law is not good for Christians to obey. God's law is His instructions for how to do what is righteous, so it would be absurd to think that doing what is righteous is only for the unrighteous and not for the righteous. Instructions for how to do what is righteous are not needed to teach those who already living in obedience to them, but rather it is the unrighteous who needed to be taught how to do that.
Christians are not under God's law
"So the law was our guardian until Christ came that we might be justified by faith. Now that this faith has come, we are no longer under a guardian." Galatians 3:24-25
Christ set a sinless example for us to follow of how to walk in obedience to the Mosaic Law, he did not hypocritically preach something other than what he practiced, and following what Christ taught by word and by example is for Christians. Someone who disregarded everything their tutor taught them after they are no longer under them would be missing the whole point of a tutor.
Jesus Christ is the end of the law
"For Christ is the end of the Law for righteousness to everyone who believes." Romans 10:4
In Romans 9:30-10:4, the Israelites had a zeal for God, but it was not based on knowledge because they did not understand that the righteousness of God only comes through faith in Christ. So they failed to obtain righteousness because they pursued the Mosaic Law as through righteousness were by works in an effort to establish their own instead of pursuing the Mosaic Law as through righteousness were by faith in Christ, for Christ is the goal of the Mosaic Law for righteousness for everyone who has faith. In Romans 10:5-10, Paul quoted Deuteronomy 30:11-16, in regard to this faith saying that the Mosaic Law is not too difficult for us to obey, that the one who obeys it will obtain life by it, and in regard to what it looks like to submit to Jesus as Lord. So there is nothing in the context of this verse that even remotely suggests that Christ is ending his eternal Mosaic Law, but just the opposite.
The law is a curse for those under it
"For all who are of works of the Law are under a curse; for it is written: “Cursed is everyone who does not abide by all the things written in the book of the Law, to do them.” - Galatians 3:13
In Galatians 3:13, they are under a curse because they are relying on works of the law instead of God's law. In Deuteronomy 28:1-14, it describes the blessing of living in obedience to God's law while verses 15-68 describe the curse of living in disobedience to it, so the fact that the law is a curse for those who refuse to submit to it is not a very good reason for you to refuse to submit to it.
The Law cannot justify us
"...knowing that a person is not justified by works of the Law but through faith in Christ Jesus, even we have believed in Christ Jesus, so that we may be justified by faith in Christ and not by works of the Law; since by works of the Law no flesh will be justified." Galatians 2:16
The Law cannot make us righteous
"I do not nullify the grace of God, for if righteousness comes through the Law, then Christ died needlessly.” Galatians 2:21
The fact that we do not earn our justification or righteousness by obeying God does not mean that we don't need to obey God.
The Law cannot give us life
"... and this commandment, which was to result in life, proved to result in death for me ..." Romans 7:10
In Romans 7:10-13, Paul said that God's law is holy, righteous, and good, and that it was not what was good that brought death to him, yet that is precisely what you are trying to use his words to blame.
"The sting of death is sin, and the power of sin is the law." 1 Corinthians 15:56
A law that is the power of sin is a law that is sinful, however, Romans 7:7 says that God's law is not sinful, but that it is how we know what sin is, therefore 1 Corinthians 15:56 is not referring to God's law, but rather it is the law of sin that is the power of sin. In Romans 7:22-23, Paul said that he delighted in obeying God's law, but contrasted that with the law of sin, which held him captive. If Romans 7:5-6 were referring to God's law, then that would mean that Paul delighted in stirring up sinful passions in order to bear fruit unto death and that he delighted in being held captive, which is absurd, but rather it is the law of sin that he described as holding him captive.
The Law is a ministry of condemnation and death
"But if the ministry of death, engraved in letters on stones, came with glory so that the sons of Israel could not look intently at the face of Moses because of the glory of his face, fading as it was, how will the ministry of the Spirit fail to be even more with glory? For if the ministry of condemnation has glory, much more does the ministry of righteousness excel in glory." 2 Corinthians 3:7-9
The fact that the law brings death to those who refuse to submit to it is not a very good reason to refuse to submit to it.
The Law has been fulfilled in us
"For what the Law could not do, weak as it was through the flesh, God did: sending His own Son in the likeness of sinful flesh and as an offering for sin, He condemned sin in the flesh, so that the requirement of the Law might be fulfilled in us who do not walk according to the flesh but according to the Spirit." Romans 8:3-4
Jesus set us free from sin so that we might be free to obey His law and meet its righteous requirement. In Romans 8:4-7, those who walk in the Spirit are contrasted with those who have minds set on the flesh who refuse to submit to God's law.
Under the Law sin is your master
"For sin shall not be your master, because you are not under law, but under grace." Romans 6:14
Paul described the law that we are not under as being a law where sin is our master, which does not refer to God's law, which is a law where holiness, righteousness, and goodness is our master (Romans 7:12), but rather it is the law of sin where sin is our master. In Romans 6:15, being under grace does not mean that we are permitted to sin, and sin is the transgression of God's law (1 John 3:4), so we are still required to obey it.
You cannot mix Law and Grace
"You foolish Galatians, who has bewitched you, before whose eyes Jesus Christ was publicly portrayed as crucified? This is the only thing I want to find out from you: did you receive the Spirit by works of the Law, or by hearing with faith? Are you so foolish? Having begun by the Spirit, are you now being perfected by the flesh?" Galatians 3:1-3
Graciousness and righteousness have always been compatible aspects of God's nature, which He showed throughout both the OT and the NT, so it is impossible to separate law and grace. In Psalms 119:29, David wanted God to be gracious to him by teaching him to obey His law, in Romans 1:5, we have received grace in order to bring about the obedience of faith, and in Titus 2:11-14, our salvation is described as being trained by grace to do what is godly, righteous, and good, and to renounce doing what is ungodly, which is what God's law was given to instruct how to do.
Christ set a sinless example for us to follow of how to obey God's law both and Paul's problem in Galatians was not with those who were teaching Gentiles how to follow Christ as if following Christ was somehow a negative thing, but rather his problem was with those who were wanting to require Gentiles to obey their works of the law in order to become justified.
Once we come to Jesus Christ by faith, the law has done its work. We can now live in a trusting and dependent relationship on the indwelling Holy Spirit instead of trusting and depending on laws designed to manage our flesh.
Grace and Peace
Obedience to God's law is about having faith in God to guide us in how to rightly live, which is why Jesus said in Matthew 23:23 that faith is one of the weightier matters of the law. There are many verses throughout the Bible that associate faith with obedience and breaking faith with disobedience, and not once is living by faith treated as being an alternative to obedience. For instance, every example of faith listed in Hebrews 11 is also an example of obedience to God's will. God's law leads us to Christ because everything in it teaches us how to grow in a relationship with him based on faith, but does not lead us to Christ so that we can refuse to grow in a relationship with him.
