The Law doesn't bring a curse. Disobedience brings a curse.
Nothing about that prevents a person from being righteous aka obeying God. And, sir, we know how good we are by how we keep the law, so you are wrong on that account as well.
Yes disobedience brings the curse that is written in the law.
Someone would know how good and how bad they are by how they keep the law no doubt.
1. The standard for righteousness is not perfection.
2. Atonement is built into the law.
3. For deliberate sins, we are to repent and turn back to God's ways, and he will forgive us. No human sacrifice needed. No mediator needed. No Jesus needed.
It is good that God provided a way for Jews to repent and be forgiven even while in exile.
The sacrificial law however is a pointer to the way God was going to make an atonement for all sins, through a sacrifice where one righteous Jew would bear all sins. This also brought in the new Covenant of grace and faith and the Spirit of God instead of the written law. A covenant that even the Gentiles could be a part of through faith along with the Jews through faith also.
It is through faith that faithful Jews obey the law as best they can and it is through faith that the followers of the Messiah obey the Spirit of God. Faith is at work through love and not just keeping commands in a law.
The Spirit of God in a person is what makes them a child of God, joined to the Jews as a chosen people but in a better covenant.
The so-called "new covenant" that Christians talk about perverts the message of the Torah. Instead of teaching obedience to the Law, which is the heart and soul of the Tanakh, it goes off into the new thing about believing in the messiah as way to go to heaven and avoid hell. THAT message, sir, is nowhere to be found in the Tanakh. You may keep your false covenant.
I don't know about the heaven and hell idea. My understanding is that God wants to be in Zion forever and that evil people will be destroyed. Anyway...................
The New Covenant is a New Covenant and has a new priesthood and new law. The Torah is based on love and the New Covenant also is based on the command to love God and our neighbour.
It is new but spoken about in the Hebrew Scriptures, not only by Jeremiah, Isaiah and Ezekiel but also we see that Abraham received righteousness by believing, and of course it was not just a head belief but a faith that brought obedience.
Genesis 15:5 And the LORD took him outside and said, “Now look to the heavens and count the stars, if you are able.” Then He told him, “So shall your offspring be.” 6
Abram believed the LORD, and it was credited to him as righteousness. 7 The LORD also told him, “I am the LORD, who brought you out of Ur of the Chaldeans to give you this land to possess.”
The New Covenant is the way for salvation that bypasses obedience to commands of the Law as the way of salvation. Abraham certainly did not have the Law. Through Abraham and his faith all the nations of the earth have been blessed however and Christians count Abraham as our father also because of faith.
In the following passage I don't think the servant spoken of in the following passage is Israel. Israel was not formed to bring Jacob back to God.
Isa 49:1 Listen to me, you islands;
hear this, you distant nations:
Before I was born the Lord called me;
from my mother’s womb he has spoken my name.
2 He made my mouth like a sharpened sword,
in the shadow of his hand he hid me;
he made me into a polished arrow
and concealed me in his quiver.
3 He said to me, “You are my servant,
Israel, in whom I will display my splendor.”
4 But I said, “I have labored in vain;
I have spent my strength for nothing at all.
Yet what is due me is in the Lord’s hand,
and my reward is with my God.”
5 And now the Lord says—
he who formed me in the womb to be his servant
to bring Jacob back to him
and gather Israel to himself,
for I am honored in the eyes of the Lord
and my God has been my strength—
6 he says:
“It is too small a thing for you to be my servant
to restore the tribes of Jacob
and bring back those of Israel I have kept.
I will also make you a light for the Gentiles,
that my salvation may reach to the ends of the earth.”
I hope you are not too offended. Maybe it gives a better understanding of what and why Christians believe what they do. Maybe you know it all ready.