Given the number of times that the texts of the bible were copied, translated and reedited, after having been passed down in some cases by word of mouth for years; it not hard to see how nearly all the supernatural events and other things could be the result of textural errors. For example, perhaps someone once recorded that their hero. "Stood up and walked about while the boat was on the waves." A brave thing to do and worthy of recording, but take out four words and you have. "Stood up and walked about on the waves." Add a couple more bad copings before you come to the gospels that survive and you have the bible story.