"As we would expect, J.I. Packer does a masterful job of unraveling the errors of antinomianism.
Thus, with regard to justification, antinomians affirm that God never sees sin in believers; once we are in Christ, whatever our subsequent lapses, he sees at every moment only the flawless righteousness of the Savior’s life on earth, now reckoned to be ours.
Then,
with regard to sanctification, there have been mystical antinomians who have affirmed that the indwelling Christ is the personal subject who obeys the law in our identity once we invoke his help in obedience situations, and
there have been pneumatic antinomians who have affirmed that the Holy Spirit within us directly prompts us to discern and do the will of God, without our needing to look to the law to either prescribe or monitor our performance.
The common ground is that those who live in Christ are wholly separated from every aspect of the pedagogy of the law. The freedom with which Christ has set us free, and the entire source of our ongoing peace and assurance, are based upon our knowledge that what Christ, as we say, enables us to do he actually does in us for himself.
So now we live, not by being forgiven our constant shortcomings, but by being out of the law’s bailiwick altogether; not by imitating Christ, the archetypal practitioner of holy obedience to God’s law, but by burrowing ever deeper into the joy of our free justification, and of our knowledge that Christ himself actually does in us all that his and our Father wants us to do.
Thus the correlating of conscience with the Father’s coded commands and Christ’s own casuistry of compassion need not and indeed should not enter into the living of the Christian life, as antinomians understand it.
The bottom line of all this? The conclusion of the matter?
Here, as elsewhere, the reaction of man does not lead to the righteousness of God, but rather obstructs holiness. In God’s family, as in human families, an antinomian attitude to parental law makes for pride and immaturity, misbehavior and folly. Our true model of wise godliness, as well as our true mediator of God’s grace, is Jesus Christ, our law-keeping Lord. (x-xi)"
https://www.thegospelcoalition.org/blogs/kevin-deyoung/antinomianism-its-bigger-than-you-think/
And this:
"The word
antinomianism comes from two Greek words,
anti, meaning "against"; and
nomos, meaning "law."
Antinomianism means “against the law.” Theologically, antinomianism is the belief that there are no moral laws God expects Christians to obey. Antinomianism takes a biblical teaching to an unbiblical conclusion. The biblical teaching is that Christians are not required to observe the Old Testament Law as a means of salvation. When Jesus Christ died on the cross, He fulfilled the Old Testament Law (
Romans 10:4;
Galatians 3:23-25;
Ephesians 2:15). The unbiblical conclusion is that there is no moral law God expects Christians to obey."
https://www.gotquestions.org/antinomianism.html