While it is true that the New Covenant is that of grace, do not forget what Jesus said.
Matthew 5:17-19 NASB95
“Do not think that I came to abolish the Law or the Prophets; I did not come to abolish but to fulfill. [18] For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass from the Law until all is accomplished. [19] Whoever then annuls one of the least of these commandments, and teaches others to do the same, shall be called least in the kingdom of heaven; but whoever keeps and teaches them, he shall be called great in the kingdom of heaven.
What did Jesus come to do? Jesus said, "Do not think that I came to destroy the Law or the Prophets. I did not come to destroy BUT TO FULFILL." Jesus didn't destroy the law. He fulfilled it, allowing the law to pass away.
RE Mt 5:17-18. Read that passage again and think about it. Unless heaven and earth has already passed away, we are still under every detail of the law. If interested, see my article about the “New Heaven and New Earth” here: