Putting Jesus in a Harvard class room with Paul is the same problem Jesus might have figured when he was sawing boards with his papa---as soon as your beliefs were subject to the approval of your "betters" you were skinned.
Saying that are attributed to Jesus the carpenter showed up in more places than the NT would lead you to believe. But THE CHURCH wouldn't tolerate them. The writings were burned whenever the church could find them. And the Church persecuted and killed those who valued the writings
That Paul was a resurrection-believing Pharisee pushed the NT's emphasis on Jesus being raised and the promise that salvation=resurrection. Resurrection=salvation as the center of the NT epistles is the tragedy of Christiaity-- a tragedy in our times.
The teachings that were banned in the early church were in the gospels that the churchfathers burned.
Theology is the whip in the hands of the "learned" once more. Priests and scribes--don't people wait to hear God speak through them?
On the other hand, having a teacher of goodness, love and forgiveness--well, this brave teaching is good and well conveyed by folk to simple folk. Without a priest.
To my thinking, a salvation that relies primarily on having the perfect "Credo" impeccably memorized has long allowed "Christians" to enslave, and kill, steal, etc. The salvation that was earthier, imo, is the one that doesn't looks to living with kindness NOW.
Paul got into the early church and --even if with good intentions--really subverted the beauty and the accessability of Jesus' teachings.