Christians how do you know for sure that Jesus spoke to Saul?

Seriously, you are taking this way too far. First, there are many different views about the no women preaching thing. Look up the view "egalitarian" in connection with women in ministry and you will find a whole different approach. Also, I have absolutely no problem that Paul was ripping off OT texts. He was a Jew writing to a Jewish audience; it was the Bible they both had at the time. Preachers today do the same thing by citing Bible verses. Also, the difference in wording might come from the fact Paul could be citing the LXX which is the Greek version of the OT. Don't let these minor discrepancies throw Paul under the bus, he is our friend!