John 1:17 DOES NOT say that of Jesus. For the law was given by Moses, but grace and truth came by Jesus Christ. How does that say that Jesus did not teach the law? How does that compare with the fact that Jesus said He did not come to change the law?
How does Jesus teach His own commandments? Is His commandments different from that of His Father's? You would hold that view after Jesus Himself said that He and His Father are one? After Jesus said that if you see Him you see the Father? The point is that the Holy Spirit, the son and the Father work under the same principles so how can Jesus now have different rules than that of the father? Even Paul confirms the oneness of operation.
Cor. 5:19 To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation.
Did the Father contradict His own Commandments as Jesus did all that He did in His father will? John 5:30 I can of mine own self do nothing: as I hear, I judge: and my judgment is just; because I seek not mine own will, but the will of the Father which hath sent me.
The law says that we should have no other God! Are you saying that according to Paul we are deliver from that law? Did not Paul say Do we then make void the law through faith? God forbid: yea, we establish the law. Romans 3:31. How can Paul mean that there is no law for us and yet say that we establish the law? Would it not make sense to understand Paul as meaning that we are not under the condemnation of the law because we have Christ our salvation?
Is it matter of choosing law over grace? Or having grace to Worship God alone? Grace to love your neighbour as yourself.
12 For the priesthood being changed, there is made of necessity a change also of the law. This have nothing to do with the Ten commandments. Heb. 8: Now of the things which we have spoken this is the sum: We have such an high priest, who is set on the right hand of the throne of the Majesty in the heavens; 2 A minister of the sanctuary, and of the true tabernacle, which the Lord pitched, and not man.
Paul makes it clear that he was talking about the priesthood. That Christ was not a Levi.
13 For he of whom these things are spoken pertaineth to another tribe, of which no man gave attendance at the altar.
14 For it is evident that our Lord sprang out of Juda; of which tribe Moses spake nothing concerning priesthood.