As far as we know Jesus didn't write anything down, so all we have are the reports of the words of Jesus written long after his death. St Paul on the other hand was a prolific very opinionated letter writer, whose writings make up most of the NT. A lot of Christian doctrine is based on Paul's very human opinions. We have no idea if Jesus would have got on with Paul, or agreed with him. It seems strange to me that Jesus is the figurehead for Christianity yet it is Paul's opinions that are often quoted and used as an excuse for intolerance towards homosexuals and for the inequality of women. I am sure the slave masters would have pointed to Paul's injuction for slaves to honour their masters as an endorcement for keeping slaves! Whether Paul intended it or not his words have been used as an excuse for some to treat others badly.