The Christian's relationship to God's Law

A quote from an article (The Great Gospel Deception, Chapter Five - Shepherd Serve):
"A favorite antinomian expression is, “I’m so glad I’m not under the Law, but under grace.” Although this is a biblical expression, the antinomian rips it from its context. He uses it to mean, “I’m so glad that I don’t have to be concerned when I commit a certain sin” or, “I’m so glad I don’t always have to be worrying about what God approves or disapproves, as they had to under the Law.” Such interpretations reveal a grave error in interpreting an important biblical expression.

The New Testament does indeed inform us that those who are in Christ are not “under the Law, but under grace” (Rom. 6:14). However, Scripture makes it very clear that, whatever this expression means, it does not mean that those who are under grace have a license to sin. By taking a few scriptures out of context, antinomians force a meaning on a biblical expression that contradicts the whole tenor of Scripture. For example, consider Paul’s words in Romans 3:31:

Do we then nullify the Law through faith? May it never be! On the contrary, we establish the Law.

Clearly, some of what Paul writes in Romans is a defense against a Jewish argument that his gospel of grace would lead people to sin. We can almost hear Paul’s antagonists shouting at him: “If people are saved by faith and not by obeying the Law as you say, then you are nullifying God’s Law!”

“On the contrary,” Paul responded. “You who have been trying to be saved by keeping the Law have never come close to obeying it fully yourselves. But those who have faith in Jesus are born again. God’s law is written in their hearts, sin’s power is broken over their lives, and they are indwelt by God’s Spirit. By virtue of these things and others, they begin keeping the letter and spirit of the moral aspects of the Law. Do we then nullify the Law through faith? May it never be! On the contrary, we establish the Law.” (end quote)

Romans 2:12-15 (NLT):
"When the Gentiles sin, they will be destroyed, even though they never had God’s written law. And the Jews, who do have God’s law, will be judged by that law when they fail to obey it. 13 For merely listening to the law doesn’t make us right with God. It is obeying the law that makes us right in his sight. 14 Even Gentiles, who do not have God’s written law, show that they know his law when they instinctively obey it, even without having heard it. 15 They demonstrate that God’s law is written in their hearts, for their own conscience and thoughts either accuse them or tell them they are doing right."

Psalm 119:93 (NLT):
"I will never forget your commandments, for by them you give me life."

However, in the case of narcissistic sociopaths, their consciences are dead, so they ignore God's law and instead follow deceptive spirit and teachings that come from demons through false teachers.

1 Timothy 4:1-2 (NLT):
"Now the Holy Spirit tells us clearly that in the last times some will turn away from the true faith; they will follow deceptive spirits and teachings that come from demons. 2 These people are hypocrites and liars, and their consciences are dead."

It's only when you instinctively obey God's law that you show that God's law is written on your heart, which is the New Testament/Covenant. The Old Covenant involved stone tablets and other methods of relaying God's law to people (ex. by word of mouth, scrolls, etc.). However, in the New Covenant which is applicable to both Jewish and Gentile believers, God's law is now Divinely written on their hearts and minds. As an addition, God has made The Holy Bible now freely and easily available through printed format and digital formats like on the internet. Hence, since believers primarily have God's written on their hearts and minds and in addition have other sources of God's law through printed and digital formats, no one has an excuse in not knowing right from wrong according to God's standards. No one has an excuse to continue sinning and abuse His grace. It's only when your conscience is dead/you choose to suppress your conscience, that you bring about your own spiritual destruction.

Hebrews 10:16 (NLT):
"This is the new covenant I will make with my people on that day, says the LORD: I will put my laws in their hearts, and I will write them on their minds."