There are some problems in life we can't solve by ourselves. We need an advocate to come alongside and plead our case. One of the roles of Jesus is to be our advocate. He is our priest who represents us and intercedes for us. To have someone who is for us, helping us, and even paying for us changes everything.
The birth of a baby is what we celebrate at Christmas. It is impossible to overstate how the birth of Jesus changed everything. Jesus was a Prophet, a Priest, and a King and God spoke profoundly through this baby. That message changes everything.