For everything spoken by God is possible."
So Luke here declares that he has heard the message from those persons who were actually the eyewitnesses to these things. Now Luke, no doubt, interviewed personally Mary, in order that he might get a complete understanding concerning the circumstances that were surrounding the birth of Jesus. Luke, being a doctor, would be interested in various aspects that bordered on the medical profession. And it is obvious that he received the information of chapters one and two directly from Mary. And so from his interview with Mary and his questioning of Mary, he got the information for chapters one and two. And the information in these two chapters is not found in detail like this in the other gospels. He had heard Peter and John and those who had been with Jesus, those who were eyewitnesses, he heard their stories, as they told of their relationship with Jesus and of the work and the ministry that Jesus preformed. And then he, no doubt, questioned them more thoroughly to get a more complete understanding. And having what he feels to be a complete understanding of the story, he then proceeds to write to this man Theophilus, in order that he might realize the certainty of those things that he had heard.Now Luke begins then the actual story of the gospel of Jesus by dealing with the birth, first of all, of John the Baptist, who was to be the forerunner of Jesus Christ.