It was the ceremonial law (Mose's law) that was nailed to the cross; not the moral law.
And so morally, we have an obligation to obey His law, not because it saves us, but because it is out of our gratitude, that by our faith, He saved us through His grace.
I find it odd that most Christians believe that only 9 of the commandments are to be kept and the 4th commandment - the only commandment that begins with 'Remember', may be forgotten.
Simply put, yes.
There is only one covenant. It is everlasting: And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee. Genesis 17:7 KJV
And Luke confirms the 'old' covenant still stands: To perform the mercy promised to our fathers, And to remember his holy covenant; Luke 1:72 KJV
But in summary: And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, And shall turn away ungodliness from Jacob: For this is my covenant unto them, When I shall take away their sins. Romans 11:26-27 KJV
This cup is a new covenant in my blood.
Reconcile that please
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