"He is the image of the invisible God, the first born of all creation. For. . . all things have been created by Him and for Him. And He is before all things, and in Him all things hold together. He is also head of the body, the church; and He is the beginning, the first born from the dead; so that He Himself might come to have first place in everything. For it was the Father's good pleasure for all the fullness to dwell in Him, and through Him to reconcile all things to Himself, having made peace through the blood of His cross." Colossians 1:15-20  

No longer a babe in a manger, but now King of kings and LORD of lords.  Not only His birth, but His sinless life, perfect sacrificial life, for you for me.  His death, but not only His death, His resurrection so that we too can live eternally with Him.

Indeed Joy to the World, the LORD has Come.  Christ - the true joy of Christmas.