District Overseer,
These passages of Paul simply reaffirmed his authority as an Apostle of Christ to the Corinthians that he was correcting. As one of the 12 chosen by our Lord he did have the authority over them that he was now exercising in his letters.
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.
This third heaven is nothing more than the authority that will be exercised over man during the future kingdom or Paradise that Paul was privileged to see. The words heaven and God are interchangeable for authority and do not point to identity by themselves. This authority or heaven of the future will exist in the Paradise into which Paul was projected. Up until then we had the Jewish age under Law, and then the Christian age under Grace. The Kingdom will be the third age of man under new a new heaven or under new authority living in a Kingdom under Christ.
4 How that he was caught up into paradise, and heard unspeakable words, which it is not lawful for a man to utter.
During such a time Paul was privileged to information that cannot be revealed at this time, but Paul had a glimpse into this new world and could rightly prepare the Corinthians for this hoped for Paradise. Yet, the weakness that Paul had with his eyes and in his struggles served as a balance that kept Paul from abusing his position as an Apostle in the faith.
9 And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me. . . . 12 Truly the signs of an apostle were wrought among you in all patience, in signs, and wonders, and mighty deeds.
Joseph