What I mean by this, is that the moral aspects of the Ten Commandments such as not committing adultery or murder are a standard seen in the New. Let me say it as clear as possible to not confuse you. The Love of God abiding in our hearts, and the Spirit directing our paths would never lead us into any sexual immorality. It wouldn't ever lead us into lying or cheating or taking advantage knowingly of anyone.
That said we still can't say rightly that we abide by the "moral" components of the Mosaic Law. Because some of the 613 commands have nothing to do with any ceremony or sacrificial procedure and are not listed in the "big ten" but have a seemingly "moral" aspect to them. For instance, the commands that men must not trim the sides of their temple or clip the edges of their beards is a moral command given so as to not appear as the Gentiles. So is it a sin today if Christian men don't have properly shaped facial hair?
Rightly dividing the Word of God would end so much of the debate and confusion in the Body of Christ. When Paul in his Epistles references behavior he is not saying anything unusual or what we haven't seen recorded in Scripture since Genesis. It's pretty basic and is summed up by the royal law of love. If we love people we won't betray them or take advantage of them. That should settle the debate about the place of the Law in the life of the believer.
Sadly, this is insufficient for the legalists and Judaizers. These Legalists want to take the Church backward. They are steadily teaching that Christians would grow more and experience a deeper spiritual walk with God if they just followed the Mosaic Law and observed Sabbath days and Feasts days. Let's establish once again the truth, we as Christians aren't anti-semitic. As Christians, we believe the whole Bible. I affirm Israel is the land God gave the Jews. We stand with them and support them. God made a Covenant with Abraham and will ultimately fulfill all the promises to Israel when Jesus returns.