2 Corinthians 12
1 It is doubtless not profitable for me to boast. I will come to visions and revelations of the Lord:
2 I know a man in Christ who fourteen years ago—whether in the body I do not know, or whether out of the body I do not know, God knows—such a one was caught up to the third heaven.
3 And I know such a man—whether in the body or out of the body I do not know, God knows—
4 how he was caught up into Paradise and heard inexpressible words, which it is not lawful for a man to utter.
5 Of such a one I will boast; yet of myself I will not boast, except in my infirmities.
6 For though I might desire to boast, I will not be a fool; for I will speak the truth. But I refrain, lest anyone should think of me above what he sees me to be or hears from me.
Read from Paul's experience of heaven, it doesn't look like he had a clear conscience of heaven after even being there or having a vision of it. (Not to mention he waited 14 years to put it into words!!!!! Even then he couldn't even speak about it)