Not to mention all of the visions and revelations given to Paul directly from the Lord and the fact that he was caught up to heaven.
2Co 12:1 It is not expedient for me doubtless to glory. I will come to visions and revelations of the Lord.
2Co 12:2 I knew a man in Christ above fourteen years ago, (whether in the body, I cannot tell; or whether out of the body, I cannot tell: God knoweth

such an one caught up to the third heaven.
2Co 12:3 And I knew such a man, (whether in the body, or out of the body, I cannot tell: God knoweth
2Co 12:4 How that he was caught up into paradise, and heard unspeakable words, which it is not lawful for a man to utter.
2Co 12:5 Of such an one will I glory: yet of myself I will not glory, but in mine infirmities.
Paul was not caught up to heaven,but he knew a man that was caught up to heaven,which would have to be John.