In the Pauline letters Jesus provides no knowledge. The role of Jesus is quite clear and specific in the Pauline letters. From BeDuhn's reconstruction of the Apostolikon:
3:13 Christos has purchased us from the curse of the Law by becoming a curse on our behalf
4:3 When we were infants, we were enslaved by the ordering forces of the world. 4 But when the completion of the time arrived, God sent forth his child . . . 5 so that he might purchase those under law, so that we might receive adoption.
5:1 Christos set us free for freedom. . . . Do not let yourselves be confined again in a yoke of slavery, which is the Law
1 Corinthians 6:19. . . You do not belong to yourselves, 20 for you were purchased with a price. Glorify and exalt God in your bodies.
Romans 3:24 Since we are rectified as a gift by his favor through the indemnity (paid) by Christos Jesus, 27where then is our boasting?
5:1[Therefore,] now that we have been rectified on the basis of Christos’ trust, not on the basis of the Law, let us have peace toward God [through our Master Jesus Christos, 2through whom also we have acquired progress by trust toward this favor in which we now stand], . . . 6For while we were yet weak, Christos died as a substitute for impious people at an opportune time.
And on it goes.
Nowhere in the Pauline letters, orthodox or Marcionite, are we told that Jesus came to make God known, to provide instruction, to warn people, to provide any message of any kind. What we are told over and over again is that Jesus was sacrificed for the sins of the ungodly. There is also something about being raised from the dead and having faith that he was in fact raised from the dead. But mostly its that Jesus was a sacrifice offered in our place. But there is nothing at all about Jesus making anything known to anyone. Jesus did not come to earth to spread knowledge or a message according to the Pauline letters.
However, this idea of a sacrifice is itself quite interesting and DOES support the idea that Jesus was sent by a different God.
It makes no sense that God the Jewish Creator would sacrifice his own son to "purchase us" from himself. But it does make sense that one God might send his son as a "ransom" to pay off another God. So it seems that what Paul is saying in his letters only make sense if Paul is talking about contracts and exchanges between two Gods.
God the Father sacrificing his son to pay off the God of the Law, almost like bargaining with the Devil.
Father: "Here Law Enforcer, I will give you My Son in exchange for the souls of all the people on earth."
And this is really almost the only thing that makes anything Paul says make any sense at all.
BeDuhn's also notes in relation to Luke 9:
according to Marcionite interpretation, “the confrontation between
Moses, Elijah, and Jesus certainly ended with a pact,” since Ephrem
refers to “the perverse tale of Marcion” dealing with “this pact that
Moses, etc., agreed on with the Stranger on the mountain” involving
the purchase of human souls at the price of Jesus, and so enthralled by
his glory, “they made a bargain with him, because they loved him”