Quote by Bart D. Ehrman

“It is also striking and worth noting that this apocalyptic message comes to be toned down, and then virtually eliminated, and finally preached against (allegedly by Jesus!) in our later sources. And it is not hard to figure out why. If Jesus predicted that the imminent apocalypse would arrive within his own generation, before his disciples had all died, what was one to think a generation later when in fact it had not arrived? One might conclude that Jesus was wrong. But if one wanted to stay true to him, one might change the message that he proclaimed so that he no longer spoke about the coming apocalypse. So it is no accident that our final canonical Gospel, John, written after that first generation, no longer has Jesus proclaim an apocalyptic message. He preaches something else entirely. Even later, in a book like the Gospel of Thomas, Jesus preaches directly against an apocalyptic point of view (sayings 2, 113). As time went on, the apocalyptic message came to be seen as misguided, or even dangerous. And so the traditions of Jesus’s preaching were changed. But in our earliest multiply attested sources, there it is for all to see.”

Quote by Bart D. Ehrman