In 2 Corinthians 12:2, Paul says
"I know a man in Christ who fourteen years ago was caught up to the third heaven".
This appears to contradict
1 Corinthians 2:9
"However, as it is written:
“What no eye has seen,
what no ear has heard,
and what no human mind has conceived”—
the things God has prepared for those who love him"
John 3:13
"No one has ever gone into heaven except the one who came from heaven–the Son of Man".
In my opinion, the contradiction with regards to Corinthians is that 1 Corinthians precedes 2 Corinthians and John 3 especially after the Resurrection. What are your thoughts?