Christmas celebrates a this worldly God. This is a problem. Some find the fleshliness difficult. Others find God difficult. A this worldly God on close reflection is a constant challenge to our ideas of world and god.
After I wrote that sentence I realised that I did the classic act of reducing world and god to ideas. So I add: A this worldly God on close reflection is a constant challenge to our ideas and experiences of world and god.
A this worldly god is inevitably messy intricately weaving himself into our experience, our biases and our appropriations.
A this worldly god seems infinitely interpretable; he is part of each ones experience through all time, but a this worldly god is also frighteningly particular and singular for as a human creature he is limited to his body.
A this worldly God is a problem.