1. This is the Incarnation of the Messiah Jesus (5 BC), when God left heaven to come to earth as a baby.
Phil 2:6-8 Who, being in very nature God, did not consider equality with God something to be grasped, but made himself nothing, taking the very nature of a servant, being made in human likeness. And being found in appearance as a man, he humbled himself and became obedient to death- even death on a cross!
Matt 1:20 -23 But after he had considered this, an angel of the Lord appeared to him in a dream and said, “Joseph son of David, do not be afraid to take Mary home as your wife, because what is conceived in her is from the Holy Spirit. She will give birth to a son, and you are to give him the name Jesus, because he will save his people from their sins.” All this took place to fulfill what the Lord said through the prophet: “The virgin will be with child and will give birth to a son, and they will call him Immanuel”-which means, “God with us.”