"Jesus' apostles, let alone the common people, could not understand the nature and attributes of this God-man. Neither has any subsequent generation been able to evaluate what took place on earth in the person of Jesus of Nazareth. And there can never occur an opportunity for either science or religion to check up on these remarkable events for the simple reason that such an extraordinary situation can never again occur, either on this world or on any other world in Nebadon. Never again, on any world in this entire universe, will a being appear in the likeness of mortal flesh, at the same time embodying all the attributes of creative energy combined with spiritual endowments which transcend time and most other material limitations.
"Never before Jesus was on earth, nor since, has it been possible so directly and graphically to secure the results attendant upon the strong and living faith of mortal men and women. To repeat these phenomena, we would have to go into the immediate presence of Michael, the Creator, and find him as he was in those days -- the Son of Man. Likewise, today, while his absence prevents such material manifestations, you should refrain from placing any sort of limitation on the possible exhibition of his spiritual power. Though the Master is absent as a material being, he is present as a spiritual influence in the hearts of men. By going away from the world, Jesus made it possible for his spirit to live alongside that of his Father which indwells the minds of all mankind."
The Urantia Book 152:1.4