Connections between the adult Jesus and the baby in the manger aren't easy to make. At first glance, the gospels don't help much; whatever the gospel writers had in mind, producing complete biographies of Jesus wasn't it. Mark omits Christmas altogether, and starts with Jesus getting baptized and launching his career. John has a short prelude and then does the same thing. Matthew and Luke give us the infancy narratives with a couple of sketchy references to childhood (flight into Egypt for Matthew, visit to the Temple in Luke)...