I don't doubt that Paul's letters were in flawless Greek. Being Jewish and a Temple person means that is why Saul was chosen to read these new Greek documents that mention some Jewish people. The conversion event would have been in the instant he said 'Amen.' after reading the Lord's prayer as given in the Gospel of Luke. Saul would have been the 1st to 'enjoy' the benefits of 'sincere prayer' as mentioned by Moses in De:4:30. Saul and Moses also seem to be the first and last chosen that were from the 12 Tribes.
In the few days that Saul was blind he would have been taught by the Holy Spirit so that when 'interviewed' by some 'knowing Disciples' he would have had all the correct answers. If you read the last few pages of the Gospel of John it shows that tepepethatic way was introduced on the evening of the same day that Jesus rose from the grave. You also need all 4 accounts of that same day before the full picture is available. Mary M. told Peter (Gospel according to the Greek Scribe Matthew who made copies of the original) and the Mother of James and John clued in her two sons (Greek Scribes Mark and Luke made copies of the originals)
Paul sent a letter saying one church should make copies of all the letters and circulate them to all the other Churches and that shows other people were entrusted with making very accurate copies. I did read my Bible, that is why I know it is in there and you don't. You can easily verify what I mentioned and the odds are you might even pick up something I may have overlooked but that isn't possible if you haven't read it yourself.
The Holy Spirit wasn't very helpful to Jesus. Jesus was caught with his foot in his mouth on several occasions where he was threatened with stoning by the mob for blasphemy.
Here are more reasons the Holy Spirit did not help Jesus at all. Jesus was largely incoherent most of the time and those around him did not understand what he was saying (most of the time). The few times they understood Jesus, they did not believe him.
No Christian can claim to understand Jesus's teachings.
I list the verse first followed by the point I am making.
Mark 4:34 In fact, in his public ministry he never taught without using parables; but afterward, when he was alone with his disciples, he explained everything to them.
1. So unless you were his disciple. Jesus's teachings remain unexplained to the public.
Luke 18:31 Jesus took the Twelve aside and told them, "We are going up to Jerusalem, and everything that is written by the prophets about the Son of Man will be fulfilled.
32 He will be handed over to the Gentiles. They will mock him, insult him, spit on him, flog him and kill him.
33 On the third day he will rise again."
34 The disciples did not understand any of this. Its meaning was hidden from them, and they did not know what he was talking about.
2. Even the disciples did not understand and did not know what Jesus was talking about even after the resurrection. So Jesus never got over his bad habit of speaking in parables and remained inarticulate, incoherent.
Luke 8:10 He said, "The knowledge of the secrets of the kingdom of God has been given to you, but to others I speak in parables, so that, "'though seeing, they may not see; though hearing, they may not understand.
3. Now it is not Jesus's explanation that can reveal to the disciples, but God has to give them that knowledge. Because Jesus only speaks in parables.
John 16: 25 "Though I have been speaking figuratively, a time is coming when I will no longer use this kind of language but will tell you plainly about my Father.
4. A time will come when Jesus will speak plainly, coherently. But unfortunately Jesus was put to death before he could. The time for Jesus speaking plainly has passed. Check point 2.
1 Corinthians 2:10 these are the things God has revealed to us by his Spirit. The Spirit searches all things, even the deep things of God.
5. Maybe it is the Spirit that can reveal all things. But we know the Spirit was not getting through to tbe disciples. They constantly complained they did not get what Jesus was saying. Are we in a conundrum??