Putting the decorations back into their cardboard boxes -
Some have got broken - and carrying them up to the attic.
The holly and the mistletoe must be taken down and burnt,
And the children got ready for school. There are enough
Leftovers to do, warmed up, for the rest of the week -
Not that we have much appetite, having drunk such a lot,
Stayed up so late, attempted - quite unsuccessfully -
To love all of our relatives, and in general
Grossly overestimated our powers. Once again
As in previous years we have seen the actual Vision and failed
To do more than entertain it as an agreeable
Possibility, once again we have sent Him away,
Begging though to remain His disobedient servant,
The promising child who cannot keep His word for long.
Auden posits that we want to stay locked into a kind of half-committed Christianity; it’s heavily implied, though not directly stated, that our listless Christmas celebrations are symptomatic of this. 
 Without full committal, we keep Jesus as a kind of child prodigy,  and we all know how they can turn out… 

Well So That Is That