Without dismissing the important role played by the apostles or the Evangelists themselves, we must remember that the story now recorded in the Gospels began when Mary began to ponder and, after pondering, when Mary began to tell the story about Jesus to others. It is not that Mary sat down and wrote out a Gospel. There is no evidence of that. What Mary did was pass on the story orally–by word of mother.
What was the story she passed on? The gospel story Mary announced was the dangerous story that Jesus was King and Augustus was not. Mary’s tale of two kings was dangerous the way Gutenberg’s press and the radio and the television and the Internet are dangerous. She succeeded in getting the word out. Mary knew the facts, and she began to recount the story about Jesus that we now read in the Gospels.
Scot McKnight, The Real Mary, 31-32.