It's so wonderful to hold a newborn baby in your arms. To look into the newly opened eyes, to feel the delicate skin, to hear the little squeaks. We pause here in wonder at Mary's firstborn son, lying in a manger.

But as we admire the baby in the manger, we know that he has to grow up. It's not a baby who "will be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace" (Isaiah 9:6). It's not a baby who will take on the religious establishment and the Roman caesar and Satan and sin and death. It's not a baby who will die for our sake on a cross. It's not a baby who will then rise from the tomb, ascend to heaven, and take his seat at the Father's right hand to reign.

That sweet little newborn will grow up and overturn the power structures of the world. Though he is almighty God, he becomes a helpless infant. Instead of royal robes he wears strips of cloth. Instead of a warrior surrounded by an army, he is attended by nobodies. The thunder of his authority is muted into the cries of a child.

But this helpless baby is a powerful threat because he is a promise that the days of the powerful are numbered.

Let's marvel that in this little bundle lies the power that will change our lives—and this world—forever.

"O come, let us adore him, Christ, the Lord!"