I do not disagree that Paul did indeed have the “mystery” revealed to him by Jesus. What I disagree with is that Paul is the only one to have received this revelation.
The revelation and the gospel that Paul received was the same as that of the others. Paul emphasizes that he received them straight from the risen Christ, not because he was given a different revelation, but because he had to prove that he was given the same revelation as the others. It was about the authenticity of himself as a preacher of the good news.
1 Corinthians 2:7 No, WE declare God’s wisdom, a mystery that has been hidden and that God destined for OUR glory before time began. 8 None of the rulers of this age understood it, for if they had, they would not have crucified the Lord of glory.
Did Paul have a mouse in his pocket?
Paul taught in accordance with Peter and the others, he sought their approval and imprimatur.
In Gal. 2:2-9 we read that when Paul went up to the leaders at Jerusalem to communicate to them "THAT GOSPEL which I preach among the Gentiles, (v.2), they "saw" (V. 7), and "perceived" (v.9) that God had indeed entrusted a new revelation to him, and solemnly, publicly, officially, gave him "the right hand of fellowship" (v.9), acknowledging him as God's new apostle to the nations and agreeing to confine their own ministry henceforth to Israel.
"And when James, Cephas, and John, who seemed to be pillars, perceived THE GRACE THAT WAS GIVEN TO ME..."(v.9). They didn't teach him anything. He taught them the gospel he was preaching: the gospel of the grace of God.
Once again, it PLAINLY says what it says.