A Newer Testament (resurrection and the Q source)
After the resurrection three days after the Crucifixion, Jesus came back to life.
At the same time, His followers in white from Qumran arrived at the tomb where the dead body of Jesus had been laid down. They persuaded guards before the tomb to leave the place and rolled out the big stone having been set at the entrance to the tomb cave. With the sun rays coming into the cave, Jesus got up from the floor and came outside with help from the followers.
Subsequently, women and disciples of Jesus arrived at the tomb, and some of them met and exchanged words with one of the followers of Jesus from Qumran as depicted in the Gospels.
However, when Jesus resurrected, the holy spirit having been given by the God on the River Jordan separated from the mind of Jesus. This spirit continued to appear before His disciples for a while. But, resurrected Jesus went back to Qumran with his followers from the religious center of a certain sect of Judaism.
Jesus must have continued to live in Qumran till the the First Jewish–Roman War (66–73 CE) when all the residents of Qumran left the site as Roam troops advanced there.
But what did Jesus do while living in or after leaving Qumran?
He must have written His memoir that later became the Q source and an underlying source of the Gospel of Mark:
The Q source (also Q document, Q Gospel, Q Sayings Gospel, or Q from German: Quelle, meaning "source") is a hypothetical written collection of Jesus' sayings (logia). Q is (part of) the common material found in the Gospels of Matthew and Luke but not in the Gospel of Mark. According to this hypothesis, this material was drawn from the early Church's Oral Tradition.Indeed, there are some descriptions about certain incidents in the Gospels that no other than Jesus could know and Jesus would not say to any others.
https://en.wikipedia.org/wiki/Q_source
So, a theory based on this version of the Gospel is that parts of the Gospels were really written by Jesus Himself, though the holy spirit having been given to Him on the River Jordan by God had already left Him.
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Rev 1:20 The mystery of the seven stars which thou sawest in my right hand, and the seven golden candlesticks. The seven stars are the angels of the seven churches: and the seven candlesticks which thou sawest are the seven churches.