A small correction; I did not say that the law came as a box set, I said the Decalogue came as a box set.
I disagree that God ever regarded the ceremonial and judicial laws as equal to the moral law as summarized in the Decalogue. Firstly, as I pointed out in my O.P., only the Decalogue was written by the very finger of God (Deuteronomy 5:22).
Yes, written by the finger of God on
stone. This is the ministry of death, in contrast to the ministry of the Spirit which is written on the "fleshy tables of the heart".
"And you show that you are a letter from Christ delivered by us, written not with ink but with the Spirit of the living God, not on tablets of stone but on tablets of human hearts."
Does Paul say anything further here about the Law written on stones? Yes. Everything that is
underlined is Paul's expounding of the Law, written in stone. Can we find anything good in what he writes?
"[O]ur sufficiency is from God, who has made us sufficient to be ministers of a new covenant, not of the letter but of the Spirit. For the letter kills, but the Spirit gives life.
"Now if the ministry of death, carved in letters on stone, came with such glory that the Israelites could not gaze at Moses' face because of its glory, which was being brought to an end, will not the ministry of the Spirit have even more glory? For if there was glory in the ministry of condemnation, the ministry of righteousness must far exceed it in glory." 2.Cor. 3:5b-9
The Law is of the
letter, not of the Spirit.
It
kills. The Spirit gives life.
It is - at best - a
ministry of death.
It is a
ministry of condemnation.
It has a
termination point.
None of it has survived this side of AD 70.
Now, concerning your first paragraph, you still have not shown a
biblical reason why
part of the Law can be done away with and not the
rest. I believe it is as integrated and unified as the cloak of Jesus was. It cannot be divided. When
any jot or tittle is fulfilled
all of it is. This is what
Matt. 5:18 is teaching.
"For truly, I say to you, until heaven and earth pass away, not an iota, not a dot, will pass from the Law until all is accomplished."
This is to say that ALL of the Law is in effect until the very point when NONE of the Law is in effect. There is no wiggle room here for partial abrogation/partial observance.
So if we are still obligated to, say, observe the Sabbath, we are just as obligated to be circumcised on the eighth day.
Those who might say that the Law here referred to by our Lord in Matthew 5 is strictly the Decalogue, and thus it is still in effect "until heaven and earth has passed away" (more on that misunderstood phrase below) have never really looked at this chapter very carefully. The Law he references is wider than just those Ten Commandments. See vs.
38-39:
“You have heard that it was said, ‘An eye for an eye and a tooth for a tooth.’ But I say to you, Do not resist the one who is evil. But if anyone slaps you on the right cheek, turn to him the other also."
Where is this in the Decalogue? It isn't. But it is all part of what Christ had in mind when He speaks of the "Law". And it is part of what will continue to stay in effect "
until heaven and earth has passed away".
"
Heaven and earth" is a Biblical term referring to the Jewish Dispensation.
In
Deuteronomy 32:1 God speaks to Israel:
"Give ear, 0 ye heavens, and I will speak; and hear, 0 earth, the words of my mouth".
This all passed away, and the New Heaven and New Earth of the Christian dispensation have replaced it. (But I will not go further on this
in this thread, so as not to derail the OP)
In sum: We are not obligated to any part of the Decalogue - as it is written. Christ said that the Law is summed up in loving God with all of your mind, heart, soul, and strength. And loving our neighbor as we love ourselves.
The Holy Spirit guides us in all this. Every day.