Pretend something like this happened for a moment: The angel Gabriel got back to heaven and rushed up to God and said, "I've got good news, and I've got bad news."

And God said, "Well, give me the good news first."

"The good news is," said the angel, "mission accomplished. I've visited those people you told me to visit. I told them what you told me to tell them. And it's all accomplished."

God said, "So what's the bad news?"

"The bad news," the angel said, "is that those people down there on earth are terrified of you. Every time I visited someone I had to start it off with 'fear not,' because they got so frightened that you were coming close."

God said to the angel, "That's the reason I have to carry out the plan I've made."

"You see," God said to the angel, "I need to go to earth because my people are so frightened. They are so full of fear that I've got to bring the message that they no longer need to be afraid."

The angel said, "And how are you going to do that, since they're so fearful?"

God said, "There's one place on earth that people are not afraid: that one remaining place is a little baby. My people on earth are not afraid of a baby. When a baby is born they rejoice and give thanks without fear because that's the only place left in their lives where they're not afraid. So I will go to earth. I will become a little baby, and they will receive me with no fear at all, because that's the one place my people have no fear."

God acted in the only way God could act without overwhelming us and taking away our freedom.  God became a tiny babe. Christmas is an act of God. In Christmas God acted in the only way God could have acted.