I like Handel's Messiah 'cuz it ties Christmas and Easter together, defining the reason for quiet joy in this moment, even in the face of peril and uncertainty - by tying the brutality of Christ's suffering (Watch Mel Gibson's 'Passion of Christ') with glories to come, especially with the selected Old Testament prophecies that shine directly across the Gospel onto the dark yet glorious passages of Revelations.
And in the middle of the whirlpool pitting terror vs hope, injustice vs righteous fury, perversion vs incorruptibility, and pain vs yearning - - - is the peace of a newborn child.
Merry Christmas everyone.
Then, if you want a song to party in the streets: Personent Hodie, arr. Benjamin Britten.