Matthew 17:9

Jesus charged them Tell the vision to no man Not to the rest of the disciples, lest they should be grieved and discouraged because they were not admitted to the sight; nor to any other persons, lest it should enrage some the more, and his approaching sufferings should make others disbelieve it. “He knew,” says Macknight, “that the world, and even his own disciples, were not yet capable of comprehending the design of his transfiguration, nor of the appearing of Moses and Elias; and that if this transaction had been published before his resurrection, it might have appeared incredible, because hitherto nothing but afflictions and persecutions had attended him.” Till the Son of man be risen again Till the resurrection shall make it credible, and confirm your testimony about it. Accordingly we learn from Mark and Luke, that they kept the matter close, and told no man in those days any of those things which they had seen. They questioned, however, one with another, what the rising from the dead should mean, Mark 9:10. They had never heard from the doctors that the Messiah was to die, far less that he was to be raised from the dead. On the contrary, they thought he was to abide for ever, John 12:34, and that there was to be no end of his kingdom; wherefore they were utterly at a loss to understand what their Master meant when he spake of his rising again; and being afraid to ask a particular explication of the matter, they disputed much among themselves about it to no purpose.