God’s sign is simplicity. God’s sign is the baby. God’s sign is that he makes himself small for us. This is how he reigns. He does not come with power and outward splendour. He comes as a baby – defenceless and in need of our help. He does not want to overwhelm us with his strength. He takes away our fear of his greatness. He asks for our love: so he makes himself a child.
...from Pope Benedict's 2006 midnight Christmas mass homily.