Yes, Paul changed everything…
Or did he?

Walk into any mainstream Christian church (there are 40,000 or more denominations) and ask this question:
“Are we supposed to keep the commandments of God?”
The explanation that follows will lead you to believe that the law is done away with, and that we are no longer required to follow “The Law.”
Next question:
Can you show me this is true using scripture?
Your church leader (pastor, minister, preacher, reverend, clergyman, priest, chaplain, vicar, bishop, pope, etc) will use the writings of Paul to explain his position on this topic.
He will not use direct quotes of Yehova, because Yehova gave His commands and said they are forever.
He will not use direct quotes of Messiah, because He teaches what the Father taught.  Messiah tells us that the lawless will not be in His kingdom.
Your religious leader will only be able to explain his doctrine using the written words of Paul.

This should be your next question:
Can you show me in scripture where Paul was given the authority to change the things that God and Messiah said are forever?

This is normally the point where your church leader will start pointing to his fancy degrees and certifications on his office wall.
He’ll start saying words like dispensation and Jesus-era.
But he will not be able to show you what you’ve requested.
If you stick to your guns instead of giving up and agreeing with him, be prepared to be shunned and avoided in church, and to be unfriended and blocked on Facebook.

But here is what you must keep in mind:
Your question will not be answered properly. The scriptures do not support mainstream church doctrine.
Church leaders will make a very compelling case to explain what they believe is true, but they can only use the writings of Paul to do so. And they can only do so using bits and pieces of Paul’s writings.

That gives us several options to consider:
1. Paul is a false prophet.
2. Paul was given authority to change scripture.
3. Paul’s writings are misunderstood.

#1 – Paul is a false prophet.
Deuteronomy 13:1-6 gives us the test of a false prophet:
“Whatever I command you, you must take care to do—you are not to add to it or take away from it.
² “Suppose a prophet or a dreamer of dreams rises up among you and gives you a sign or wonder, ³ and the sign or wonder he spoke to you comes true, while saying, ‘Let’s follow other gods’—that you have not known, and—‘Let’s serve them!’  ⁴ You must not listen to the words of that prophet or that dreamer of dreams—for Adonai your God is testing you, to find out whether you love Adonai your God with all your heart and with all your soul. ⁵ Adonai your God you will follow and Him you will fear. His mitzvot [commands] you will keep, to His voice you will listen, Him you will serve and to Him you will cling. ⁶ That prophet or dreamer of dreams must be put to death! For he has spoken falsehood against Adonai your God, who brought you out from the land of Egypt and redeemed you from the house of slavery, to entice you from the way Adonai your God commanded you to walk. So you will purge the evil from your midst.

If we believe Paul’s writings are saying we should not follow the instructions of Yehova, then we have to reject him as a false prophet.
Did you catch those words above?  for Adonai your God is testing you, to find out whether you love Adonai your God with all your heart and with all your soul.
This is important!!

#2 Paul was given authority to change scripture
I’ve tried searching scripture for anything that would support this idea, but I can’t find it.  In fact, I find quite the opposite:
Deuteronomy 4:2
You must not add to the word that I am commanding you or take away from it—in order to keep the mitzvot [commands] of Adonai your God that I am commanding you. 

Deuteronomy 12:32
 “Whatever I command you, be careful to observe it; you shall not add to it nor take away from it.”

 Proverbs 30:5-6
⁵ Every word of God is pure;
He is a shield to those who put their trust in Him.
⁶ Do not add to His words,
Lest He rebuke you, and you be found a liar.

These scriptures (and many more like them) tell us that no man is able to add to or take away from the words of Yehova.

Again, does Paul have the authority to change the words of scripture?
Matthew 28:18
¹⁸ And Yeshua Messiah came and spoke to them, saying, “All authority has been given to Me in heaven and on earth.”
If Messiah has ALL of the authority, that means Paul has none of the authority.

John 1 tells us that Messiah is the word become flesh.
Hebrews 13:8 tells us this:
⁸ Yeshua the Messiah is the same yesterday, today, and forever. 

If the word is Messiah, and Messiah never changes, then the word never changes.
This means that Paul changed nothing…

#3 Paul’s writings are misunderstood
Ok, now we are getting somewhere…
My study of scripture tells me this third scenario is what has happened.
Did you know we are warned against making this mistake?
2Peter 3:14-17
¹⁴ Therefore, loved ones, while you are looking for these things, make every effort to be found in shalom, spotless and blameless before Him. ¹⁵ Bear in mind that the patience of our Lord means salvation—just as our dearly loved brother Paul also wrote to you with the wisdom given to him. ¹⁶ He speaks about these matters in all of his letters. Some things in them are hard to understand, which the ignorant and unstable twist (as they also do with the rest of the Scriptures)—to their own destruction.
¹⁷ Since you already know all this, loved ones, be on your guard so that you are not led astray by the error of the lawless and lose your sure footing.

Do not follow the error of the lawless!!
It will result in our destruction!

Here is the thing:
Mainstream doctrine teaches that Paul changed theology. This is where the idea that “The Law” is done away with…
Absolutely no where in scripture do we find that Paul was tasked with changing doctrine.
So what is Paul talking about then?

Paul teaches that we are NOT to follow the law in order to earn or achieve salvation. I agree with him… We are not to try this!!
Paul was not, however, teaching us to not follow the law.
There is a big difference.

Let’s look at this using a father and son as an example.
If a father teaches his son to not buy his girlfriend flowers and gifts in order to manipulate her feelings and actions, that doesn’t mean he is teaching his son to never buy her gifts.

It is all about the reason. It is about the heart.
Giving flowers and gifts to show someone you care for them is a wonderful thing.  Giving a girlfriend flowers and gifts to convince her to get naked is a bad thing.

Do I believe we should keep the commandments in the Torah (Old Testament Law)?
Yes, I believe this is true doctrine.
Do I think we should do so legalistically, in order to “earn” salvation?
Absolutely not!!

Why do I think we should do our best to keep His commands?
Our Messiah says that is how He will know if we love Him.

John 14:15 
“If you love Me, you shall keep My commands.”
John 14:21
“He who possesses My commands and keeps them, it is he who loves Me. And he who loves Me shall be loved by My Father, and I shall love him and manifest Myself to him.”
John 15:10
“If you keep My commands, you shall stay in My love, even as I have kept My Father’s commands and stay in His love.

Let’s end with this warning of Messiah:
Matthew 7:21-23
²¹ “Not everyone who says to Me, ‘Lord, Lord!’ will enter the kingdom of heaven, but he who does the will of My Father in heaven. ²² Many will say to Me on that day, ‘Lord, Lord, didn’t we prophesy in Your name, and drive out demons in Your name, and perform many miracles in Your name?’ ²³ Then I will declare to them, ‘I never knew you. Get away from Me, you workers of lawlessness!’”