Kurt,
You posted that you feel Paul made up his gospel, and it’s different than what Jesus taught. From your earlier posts and conversations, I understand, a little, about how you feel.
I wanted to share with you why that’s not the way I feel.
First, there’s Paul’s testimony about how he learned about the Gospel:
Gal 1:12-20 NET. For I did not receive it or learn it from any human source; instead I received it by a revelation of Jesus Christ. (13) For you have heard of my former way of life in Judaism, how I was savagely persecuting the church of God and trying to destroy it.
(14) I was advancing in Judaism beyond many of my contemporaries in my nation, and was extremely zealous for the traditions of my ancestors. (15) But when the one who set me apart from birth and called me by his grace was pleased (16) to reveal his Son in me so that I could preach him among the Gentiles, I did not go to ask advice from any human being, (17) nor did I go up to Jerusalem to see those who were apostles before me, but right away I departed to Arabia, and then returned to Damascus.
(18) Then after three years I went up to Jerusalem to visit Cephas and get information from him, and I stayed with him fifteen days. (19) But I saw none of the other apostles except James the Lord's brother. (20) I assure you that, before God, I am not lying about what I am writing to you!
He didn’t know what the Gospel message was, he was a strict Jew, until he learned about Jesus and his salvation by being taught by him for three years in the desert. I refer to this as Paul’s three years in Bible school.
After the three years, he went to Jerusalem and visited with Peter. If Paul was making up his Gospel Peter would be obligated to refute or correct him.
After 14 years, when Paul’s message was time tested, he returned to Jerusalem with Barnabas and Titus and no one corrected his Gospel message.
Gal 2:1 NET. Then after fourteen years I went up to Jerusalem again with Barnabas, taking Titus along too.
Again, there was ample opportunity for others to correct Paul, but they didn’t, they accepted his Gospel as the same as there’s.
Gal 2:7-10 NET. On the contrary, when they saw that I was entrusted with the gospel to the uncircumcised just as Peter was to the circumcised (8) (for he who empowered Peter for his apostleship to the circumcised also empowered me for my apostleship to the Gentiles) (9) and when James, Cephas, and John, who had a reputation as pillars, recognized the grace that had been given to me, they gave to Barnabas and me the right hand of fellowship, agreeing that we would go to the Gentiles and they to the circumcised. (10) They requested only that we remember the poor, the very thing I also was eager to do.
By now, if Paul was making it up, Barnabas, Titus, James, Peter, and John would be making up a new Gospel also.
Luke also accepted Paul’s Gospel as real. Luke set out an orderly account of Jesus’s teachings and he didn’t accuse Paul of ‘making it up’.
Luk 1:1-4 NET. Now many have undertaken to compile an account of the things that have been fulfilled among us, (2) like the accounts passed on to us by those who were eyewitnesses and servants of the word from the beginning. (3) So it seemed good to me as well, because I have followed all things carefully from the beginning, to write an orderly account for you, most excellent Theophilus, (4) so that you may know for certain the things you were taught.
Luke continued his presentation of Jesus’ followers in Acts:
Act 1:1-5 NET. I wrote the former account, Theophilus, about all that Jesus began to do and teach (2) until the day he was taken up to heaven, after he had given orders by the Holy Spirit to the apostles he had chosen.
(3) To the same apostles also, after his suffering, he presented himself alive with many convincing proofs. He was seen by them over a forty-day period and spoke about matters concerning the kingdom of God. (4) While he was with them, he declared, "Do not leave Jerusalem, but wait there for what my Father promised, which you heard about from me. (5) For John baptized with water, but you will be baptized with the Holy Spirit not many days from now."
Luke went on to record the best account we have of the Acts of the Holy Spirit, and nowhere did he or any of the other eyewitnesses he interviewed ever contradict Paul and say that he was making it up.
Luke records the first Church Council meeting as follows:
Act 15:1-30 NET. Now some men came down from Judea and began to teach the brothers, "Unless you are circumcised according to the custom of Moses, you cannot be saved." (2) When Paul and Barnabas had a major argument and debate with them, the church appointed Paul and Barnabas and some others from among them to go up to meet with the apostles and elders in Jerusalem about this point of disagreement.
(3) So they were sent on their way by the church, and as they passed through both Phoenicia and Samaria, they were relating at length the conversion of the Gentiles and bringing great joy to all the brothers. (4) When they arrived in Jerusalem, they were received by the church and the apostles and the elders, and they reported all the things God had done with them. (5) But some from the religious party of the Pharisees who had believed stood up and said, "It is necessary to circumcise the Gentiles and to order them to observe the law of Moses."
(6) Both the apostles and the elders met together to deliberate about this matter. (7) After there had been much debate, Peter stood up and said to them, "Brothers, you know that some time ago God chose me to preach to the Gentiles so they would hear the message of the gospel and believe. (8) And God, who knows the heart, has testified to them by giving them the Holy Spirit just as he did to us, (9) and he made no distinction between them and us, cleansing their hearts by faith. (10) So now why are you putting God to the test by placing on the neck of the disciples a yoke that neither our ancestors nor we have been able to bear? (11) On the contrary, we believe that we are saved through the grace of the Lord Jesus, in the same way as they are."
(12) The whole group kept quiet and listened to Barnabas and Paul while they explained all the miraculous signs and wonders God had done among the Gentiles through them.
(13) After they stopped speaking, James replied, "Brothers, listen to me. (14) Simeon has explained how God first concerned himself to select from among the Gentiles a people for his name. (15) The words of the prophets agree with this, as it is written, (16) 'After this I will return,
and I will rebuild the fallen tent of David;
I will rebuild its ruins and restore it, (17) so that the rest of humanity may seek the Lord,
namely, all the Gentiles I have called to be my own,' says the Lord, who makes these things (18) known from long ago. (19) "Therefore I conclude that we should not cause extra difficulty for those among the Gentiles who are turning to God, (20) but that we should write them a letter telling them to abstain from things defiled by idols and from sexual immorality and from what has been strangled and from blood. (21) For Moses has had those who proclaim him in every town from ancient times, because he is read aloud in the synagogues every Sabbath."
(22) Then the apostles and elders, with the whole church, decided to send men chosen from among them, Judas called Barsabbas and Silas, leaders among the brothers, to Antioch with Paul and Barnabas. (23) They sent this letter with them:
From the apostles and elders, your brothers, to the Gentile brothers and sisters in Antioch, Syria, and Cilicia, greetings! (24) Since we have heard that some have gone out from among us with no orders from us and have confused you, upsetting your minds by what they said, (25) we have unanimously decided to choose men to send to you along with our dear friends Barnabas and Paul, (26) who have risked their lives for the name of our Lord Jesus Christ. (27) Therefore we are sending Judas and Silas who will tell you these things themselves in person. (28) For it seemed best to the Holy Spirit and to us not to place any greater burden on you than these necessary rules: (29) that you abstain from meat that has been sacrificed to idols and from blood and from what has been strangled and from sexual immorality. If you keep yourselves from doing these things, you will do well. Farewell.
(30) So when they were dismissed, they went down to Antioch, and after gathering the entire group together, they delivered the letter.
Now we have the whole church in Jerusalem (probably including at least some of the 12 apostles) listening to Paul and Barnabas tell of the miracles God preformed via their message and the number of Gentiles that were accepting Jesus’ death on the cross in their behalf. None of them corrected Paul, telling him he was making all of this up out of his head.
Added to this list of witnesses I accept the judgement of the early church fathers and the hundreds of people in that first century that knew what Jesus taught and what Paul taught and they didn’t see any difference nor did they accuse Paul of ‘making it up’.
The later church fathers, and the ones that created the cannon, didn’t accuse Paul of making his Gospel up out of his head.
If we can’t take the testimony of the local people that saw Jesus and heard Paul as true, then it seems to me that we cannot trust anything from history.
So, again, here is my reasons for taking Paul at his word, the other I witnesses accepted his word as true and therefore so do I.
I hope this helps.