Do you think Paul knew Jesus personally before Paul met him on the road to Damascus?  Knew Jesus back when they were growing up?  They must have crossed paths.  They were members of the same Jewish society church and study group when they were growing up. 

There are those who like to say that Jesus didn't have to learn anything, that he knew it all because he was God.  I don't think so.  He was also human and had to grow from a baby to a toddler to a little boy.  He had to learn to read.  The Bible says he was in all ways like us.  Hebrews 2:16 "Wherefore in all things it behoved him to be made like unto his brothers..."  In all things.

You remember the story about Jesus and his parents going to the temple in Jerusalem for the passover. Jesus stayed there after everyone else had left.  
When his parents discovered he wasn't in the group that was headed home with them, they went back and found him quizzing the doctors (of the law). The scholars of those days. "..both hearing them and asking them questions..."

He told his parents that they should have known that he would be about his Father's business.  That is, learning more Scripture.  Jesus didn't have a Bible.

Then, remember, Paul studied at the feet of Gamaliel, "...a doctor of the law...with a reputation among all the people..." the leading temple scholar of that day. Paul said, "I am verily a man...brought up in this city at the feet of Gamaliel..taught according to the perfect manner of the law..."  Such studies would probably have been at the Jerusalem Temple.  I can't help but wonder if Jesus and Paul crossed paths as they studied.  They were both students of the Bible.  Jesus quoted the Old Testament repeatedly.

Just speculating.