Christmas means, among other things, that we are incarnated and should always incarnate. In other words, we have bodies and those bodies aren't insignificant and we should always take that seriously.
The following is attributed to Saint Teresa of Avila and is especially applicable at Christmas.
Christ has no body now but yours,
no hands but yours,
no feet but yours.
Yours are the eyes through which
Christ's compassion must look out on the world.
Yours are the feet with which He is to go about doing good.
Yours are the hands with which He is to bless us now.