Paul wrote that, correct? The man who never met Jesus, let alone heard him speak?
Paul was a member in training for the Sandhedrin ("the council" Matthew 5:22, 26:59; Mark 14:55, 15:1; Luke 22:66; John 11:47; Philippians 3:4-6) under
Gamaliel (Acts 5:34, 22:3, and Acts was written by Luke, the Gospel writer), and was present in the days of Jesus' ministry, and His appearances amongst the Pharisees, both in and out of the Sanhedrin, as well as present for the stoning of a disciple of Jesus (Stephen, Acts 6-7(all), 8:1).
So, did Paul see and hear Jesus Christ before His arrest, trials (7) crucifixion, death, burial and resurrection and ascension? Yes.
Did Paul see Jesus afterwards also? Yes:
Act_9:5 And he said, Who art thou, Lord? And the Lord said, I am Jesus whom thou persecutest: it is hard for thee to kick against the pricks.
Act_22:8 And I answered, Who art thou, Lord? And he said unto me, I am Jesus of Nazareth, whom thou persecutest.
Act_26:15 And I said, Who art thou, Lord? And he said, I am Jesus whom thou persecutest.
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_12:7 And lest I should be exalted above measure through the abundance of the revelations, there was given to me a thorn in the flesh, the messenger of Satan to buffet me, lest I should be exalted above measure.
Acts is recorded by Luke, who was with Paul many times (2 Timothy 4:11).