Paul definitely did meet Christ:
Acts 9
3As he neared Damascus on his journey, suddenly a light from heaven flashed around him. 4He fell to the ground and heard a voice say to him,,"Saul, Saul, why do you persecute me?"
5"Who are you, Lord?" Saul asked.
"I am Jesus, whom you are persecuting,"he replied. 6"Now get up and go into the city, and you will be told what you must do."
Paul also recounts his trip to heaven in 2 Corinthians 12. I don't know if you could call that studying under Him, but I certainly think Paul was in the know :)
In Christ,
marinamuffy
I know he met Him SPIRATUALLY, but he was not while he was on earth.