My favorite Christmas Carol?
Joy to the World -- of course!
It -- more than any other -- tells how Jesus came to reverse the curse and restore God's original design for creation...
No more let sins and sorrows grow,
Nor thorns infest the ground;
He comes to make His blessings flow,
Far as the curse is found.
He rules the world with truth and grace,
And makes the nations prove,
The glories of His righteousness,
And wonders of His love.
If you need a dose of reality-based optimism, sing Joy to the World.
It Came Upon a Midnight Clear and I Heard the Bells on Christmas Day are good choices too.