Read Galatians, for example. Gal 5:1-6 is a specific instance in that book. Paul taught against circumcision of the flesh, whereas YHVH taught the necessity of both circumcision of the heart and flesh.
Paul speaking -
Galatians 5:1-6
King James Version (KJV)
5
Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage.
2 Behold, I Paul say unto you,
that if ye be circumcised, Christ shall profit you nothing.
(( Did you know that circumcising of the foreskin is of the old covenant? That is the subject. ))
(( If they were still doing blood scarifies and ordinances of the old covenant ( circumcision of the foreskin ), they could not take part in the New covenant which is Christ.
Because as its written, Christ was one sacrifice for one and all time ( Hebrews 10:1-25).
After Christ gave His perfect blood to atone for our sins, and then turn away to engage in blood rituals, would be an insult to Christ. Because the cricumsions that God wants, is of of the heart. Meaning our love for God.
This is what Paul is teaching. And every Christian would know this. You cant be a Christian or your very confused if you think Paul is wrong . God chose Paul because he knows God's words. )))
3 For I testify again to every man that is circumcised, that he is a debtor to do the whole law.
( The law of the old covenant ....Not the ten commandments... Keep with the subject.. )
4 Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.
(( If you believe Paul is saying, that you can practice, the old covenant, then Christ is Non effect to you. And your still in your sins. He is talking of the law contained in ""Ordinances """ Remember, that is what was nailed to the cross ( Colossians 2:14 ).
Not the law of God in his Commandments. There is a difference, and Paul knows this. Why don't you ? Listening to men much ? ))
5 For we through the Spirit wait for the hope of righteousness by faith.
6 For in Jesus Christ neither circumcision availeth any thing, nor uncircumcision; but faith which worketh by love.
(( This is clear. Paul is not teaching against God's law. He is teaching against the traditions of the Pharisees, which did take part as non believers in Christ, of the old covenant ( not Christian ; not God's way). God said He would make a new covenant. ))
Jeremiah 31:31-33
King James Version (KJV)
31
Behold, the days come, saith the Lord, that I will make a new covenant with the house of Israel, and with the house of Judah:
32
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:
33 But this shall be the covenant that I will make with the house of Israel; After those days,
saith the Lord, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.