The sermon should begin by telling the story of the man who brought his son to be healed by Jesus. The story should be told completely and in a way that people can feel, see, and touch the story. I would say that you tell the story from the centurion stopping Jesus up until Jesus told him that his servant shall be healed. Then give the three points. After that pick the story back up on the way home for the celebration.
Introduction: This sermon short is basically a pointer to help someone think about a text and turn it into a sermon. It is not meant to be preached now, but needs some beefing up. I have included some helpful pointers in how to preach it in the text of the sermon.