The bottom line
There are many preparation and many activities.
There are many songs and many celebrations.
The Gospel for the Vigil Mass of Christmas (Matthew 1:1-25) reminds us of the bottom line of Christmas:
All this took place
what the Lord had said through the prophet:
the virgin shall conceive
and bear a son,
and they shall name him Emmanuel,
which means "God is with us."
Beyond everything - good, bad, and empty - the bottom line os Christmas is this:
Christ is born.
God is with us.