Paul’s Gospel was by revelation, not ancient oral tales, and established upon Scriptural substantiation, not the premise of assured veracity.
“Am I not an apostle? am I not free? have I not seen Jesus Christ our Lord? are not ye my work in the Lord?” (1 Corinthians 9:1)
“As we said before, so say I now again, If any man preach any other gospel unto you than that ye have received, let him be accursed.” (Galatians 1:9)
“But I certify you, brethren, that the gospel which was preached of me is not after man. For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ.” (Galatians 1:11-12)
“But when it pleased God, who separated me from my mother’s womb, and called me by his grace, To reveal his Son in me, that I might preach him among the heathen; immediately I conferred not with flesh and blood: Neither went I up to Jerusalem to them which were apostles before me; but I went into Arabia, and returned again unto Damascus.” (Galatians 1:15-17)
You need to read post #257
**Paul’s Gospel **
First time I ever knew St. Paul wrote a Gospel!