After all, is this not how Christ walked? In love and obedience to the Father and above reproach as far as the law is concerned?
My current opinion is that the law and prophets all hang on "Love God with all your heart, mind and soul" and "Love your neighbor as yourself".
If you take into consideration that we are not the physical nation of Israel with it's government established over it, that the temple has been destroyed by God and that we are to observe the Spirit of the law and not the letter of the law and that Christ is our High Priest to the order of Melchizedek (Not Aaronic/Levitical), then what God taught through Christ in the OT does not differ from the NT.
You have heard it said that Christ did not come to abolish the law, but to "pleroo" the law, as some would translate it "fully preach", "render in full"?
Definition
to make full, to fill up, i.e. to fill to the full
to cause to abound, to furnish or supply liberally
I abound, I am liberally supplied
to render full, i.e. to complete
to fill to the top: so that nothing shall be wanting to full measure, fill to the brim
to consummate: a number
to make complete in every particular, to render perfect
to carry through to the end, to accomplish, carry out, (some undertaking)
to carry into effect, bring to realisation, realise
of matters of duty: to perform, execute
of sayings, promises, prophecies, to bring to pass, ratify, accomplish
to fulfil, i.e. to cause God's will (as made known in the law) to be obeyed as it should be, and God's promises (given through the prophets) to receive fulfilment
My reconciliation with a couple of typical issues is as follows,
Capital Punishment - Christ did not say capital punishment was abolished, but made it unobservable by subjecting Israel to Roman authority. When questioned about the prostitute, He said "let he who is without sin cast the first stone". He being the only one that could make that claim and He also was the only one who could forgive her sins, which He did.
We are still to observe the Spirit of the law in this regard, but we no longer have to kill people to physically remove them from a physical land:
Deuteronomy 17
6 On the testimony of two or three witnesses a person is to be put to death, but no one is to be put to death on the testimony of only one witness. 7 The hands of the witnesses must be the first in putting that person to death, and then the hands of all the people. You must purge the evil from among you.
1 Corinthians 5
11 But now I am writing to you not to associate with anyone who bears the name of brother if he is guilty of sexual immorality or greed, or is an idolater, reviler, drunkard, or swindler—not even to eat with such a one. 12 For what have I to do with judging outsiders? Is it not those inside the church whom you are to judge? 13 God judges those outside. “Purge the evil person from among you.”
One of the main things Paul preached against, referring to it as a work of the flesh, was physical circumcision as a requirement to belong to Christ. Many people seem to have taken these verses out of context to mean that Paul was condemning the whole law. Yet circumcision was not abolished, it is still observed in the Spirit of the law -
Romans 2
17 But if you call yourself a Jew and rely on the law and boast in God 18 and know his will and approve what is excellent, because you are instructed from the law; 19 and if you are sure that you yourself are a guide to the blind, a light to those who are in darkness, 20 an instructor of the foolish, a teacher of children, having in the law the embodiment of knowledge and truth— 21 you then who teach others, do you not teach yourself? While you preach against stealing, do you steal? 22 You who say that one must not commit adultery, do you commit adultery? You who abhor idols, do you rob temples? 23 You who boast in the law dishonor God by breaking the law. 24 For, as it is written, “The name of God is blasphemed among the Gentiles because of you.”
25 For circumcision indeed is of value if you obey the law, but if you break the law, your circumcision becomes uncircumcision. 26 So, if a man who is uncircumcised keeps the precepts of the law, will not his uncircumcision be regarded as circumcision? 27 Then he who is physically[c] uncircumcised but keeps the law will condemn you who have the written code[d] and circumcision but break the law. 28 For no one is a Jew who is merely one outwardly, nor is circumcision outward and physical. 29 But a Jew is one inwardly, and circumcision is a matter of the heart, by the Spirit, not by the letter. His praise is not from man but from God.
^^^ Notice also (besides the points on circumcision) that Paul says that those who are instructed from the law know God's will and approve what is excellent and that those who breaks God's law are the ones who are in error. He says that the law is the embodiment of knowledge and truth.
This next one is also taken by people to mean that the whole of the law was scrapped. It was written in response to people coming to the believers in Galatia and trying to convince them that they were not saved because they did not receive physical circumcision:
Galatians 3
3 O foolish Galatians! Who has bewitched you? It was before your eyes that Jesus Christ was publicly portrayed as crucified. 2 Let me ask you only this: Did you receive the Spirit by works of the law or by hearing with faith? 3 Are you so foolish? Having begun by the Spirit, are you now being perfected by[a] the flesh? 4 Did you suffer so many things in vain—if indeed it was in vain? 5 Does he who supplies the Spirit to you and works miracles among you do so by works of the law, or by hearing with faith— 6 just as Abraham “believed God, and it was counted to him as righteousness”?
7 Know then that it is those of faith who are the sons of Abraham. 8 And the Scripture, foreseeing that God would justifythe Gentiles by faith, preached the gospel beforehand to Abraham, saying, “In you shall all the nations be blessed.” 9 So then, those who are of faith are blessed along with Abraham, the man of faith.
The Righteous Shall Live by Faith
10 For all who rely on works of the law are under a curse; for it is written, “Cursed be everyone who does not abide by all things written in the Book of the Law, and do them.” 11 Now it is evident that no one is justified before God by the law, for “The righteous shall live by faith.” 12 But the law is not of faith, rather “The one who does them shall live by them.” 13 Christ redeemed us from the curse of the law by becoming a curse for us—for it is written, “Cursed is everyone who is hanged on a tree”— 14 so that in Christ Jesus the blessing of Abraham might come to the Gentiles, so that we might receive the promised Spirit through faith.
^^^ It is not saying that the law was a curse though, it is saying that any who are relying on works of the law for salvation are under a curse, because there is no law given to us which can justify us before God apart from Christ.