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What is often missed when discussing biblical law is precisely what the Ten Commandments were and are. The Bible clearly defines this with several passages, as follows:
And the LORD said unto Moses, Write thou these words: for after the tenor of these words I have made a covenant with thee and with Israel. And he was there with the LORD forty days and forty nights; he did neither eat bread, nor drink water. And he wrote upon the tables the words of the covenant, the ten commandments (Exodus 34:27-28).
And he declared unto you his covenant, which he commanded you to perform, even ten commandments; and he wrote them upon two tables of stone (Deuteronomy 4:13).
And I have set there a place for the ark, wherein is the covenant of the LORD, which he made with our fathers, when he brought them out of the land of Egypt (I Kings 8:21).
And in it have I put the ark, wherein is the covenant of the LORD, that he made with the children of Israel (II Chronicles 6:11).
There was nothing in the ark save the two tables of stone, which Moses put there at Horeb, when the LORD made a covenant with the children of Israel, when they came out of the land of Egypt (I Kings 8:9).
Thus the Ten Commandments are the Old Covenant. And likewise, the Old Covenant consists of the The commandments.
However, Christians are under the
New Covenant, which is based on God's perfect law of love:
If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well (James 2:8).
Then one of them, which was a lawyer, asked him a question, tempting him, and saying, Master, which is the great commandment in the law? Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment. And the second is like unto it, Thou shalt love thy neighbour as thyself. On these two commandments hang all the law and the prophets (Matthew 22:35-40).
Behold, the days come, saith the LORD, that I will [future tense] make a new covenant with the house of Israel, and with the house of Judah: Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, although I was an husband unto them, saith the LORD: But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will [future tense] put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people (Jeremiah 31:31-33.