That is true - But let me ask you this question: How then is Torah YOUR schoolmaster (in order to bring you to Yeshua), if you need not do it (as it is rendered insignificant)?
Easy...just read what Paul said about that "schoolmaster":
But before faith came, we were kept under the law, shut up to the faith which should afterwards be revealed. Why the law was our schoolmaster to bring us to Christ, that we might be justified by faith. But after that faith is come, we are no longer under a schoolmaster. (Galatians 3:23-25)
And then in Romans 7:7-13 -
What shall we say, then? Is the law sinful? Certainly not! Nevertheless, I would not have known what sin was had it not been for the law. For I would not have known what coveting really was if the law had not said, “You shall not covet.” But sin, seizing the opportunity afforded by the commandment, produced in me every kind of coveting. For apart from the law, sin was dead. Once I was alive apart from the law; but when the commandment came, sin sprang to life and I died. I found that the very commandment that was intended to bring life actually brought death. For sin, seizing the opportunity afforded by the commandment, deceived me, and through the commandment put me to death. So then, the law is holy, and the commandment is holy, righteous and good. Did that which is good, then, become death to me? By no means! Nevertheless, in order that sin might be recognized as sin, it used what is good to bring about my death, so that through the commandment sin might become utterly sinful.
And, in Romans 3:19-20, Paul tells us exactly the purpose of the schoolmaster of the law:
Now we know that whatever the Law says, it speaks to those who are under the Law, so that every mouth may be closed and all the world may become accountable to God; because by the works of the Law no flesh will be justified in His sight; for through the Law comes the knowledge of sin.
How much plainer can God make it?
If the Torah is our school master to bring us to Christ, then once we're in Christ, we no longer need it. It job is finished.
We are no longer obligated to obey it to maintain a right relationship with God because that's not how a right relationship with God is maintained under the new covenant.
All the blessings and curses of the OT do not apply to born again believers because God is dealing with people in a new way, the way of Christ, instead of the old way with the letter of the Law.
It's no longer *If you do this, then I'll do that.*
NOW it's grace and mercy, us being seated in the heavenly places in Christ Jesus, the Holy Spirit in us, who is the guarantee of our redemption until we acquire possession of it, that we are washed and cleansed and forgiven, having the righteous requirements of the Law met for us and in us by virtue of the fact of being in Christ, being credited to our account.