You need to preach love my friend. Not law. Preach Christ. Not moses
The law is not going to help anyone become a better christian
Okay...here is what I am saying in different words.
The love of the Lord is shed abroad in the heart of believers (Romans 5:5) and this love is the fulfilling of the law (Romans 13:8-10).
As we bear the fruit of love; joy, peace, longsuffering, gentleness, goodness, faith, meekness, temperance; there is no just law that will condemn us in our behaviour (Psalms 94:20, Galatians 5:22-23). Thus, in bearing the fruit of the Spirit (which is primarily love) we become law-abiding citizens of the kingdom of heaven.
By the law, therefore, is the knowledge of sin. And sin is any behaviour that is lacking the love of Christ.
So, if I commit adultery with my neighbor's wife, kill my neighbor, steal from my neighbor, bear false witness against my neighbor, covet what belongs to my neighbor, or violate any other commandment concerning my neighbor, I am not loving my neighbor as myself.
Therefore, the law is the specifics of the love of God for those who have the love of the Lord dwelling in their hearts. And of course there is also a New Testament law that speaks to proactive means of loving my neighbor as myself.
If I look into the perfect law of liberty and continue in it, I will be blessed in what I do...
Jas 1:22, But be ye doers of the word, and not hearers only, deceiving your own selves.
Jas 1:23, For if any be a hearer of the word, and not a doer, he is like unto a man beholding his natural face in a glass:
Jas 1:24, For he beholdeth himself, and goeth his way, and straightway forgetteth what manner of man he was.
Jas 1:25, But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.
I will here change my mind and say that the law of liberty is not the ten commandments.
For it is clear that we will be condemned by the law of Galatians 5:19-21 if we violate it.
So, the law of liberty has to do with doing away with the vices spoken of in that passage (Galatians 5:19-21) and in living by the virtues that scripture proclaims as its opposites (Galatians 5:22-23). And of course we can only do this in the power of the Spirit.
If we live by the Spirit, we will not walk according to the dictates of the flesh (Galatians 5:16); and there is no law against such behaviour (Galatians 5:22-23).
Therefore, as I bear the fruit of the Spirit, I will become a law-abiding citizen of the kingdom of heaven by virtue of my faith through which I have received the Holy Spirit.
Again, this righteousness is apart from the law but is nevertheless attested to by the law and the prophets (Romans 3:21) that it is righteousness indeed.
As I walk not after the flesh but after the Spirit, the righteousness of the law is fulfilled in me (Romans 8:4).
If I am spiritually-minded, I have peace with God, because I am subject in my mind to the law of God, and cannot be otherwise (Romans 8:7).