Here is my new favorite poem:

Via Negativa (by R.S. Thomas)

Why no! I never thought other than
That God is that great absence
In our lives, the empty silence
Within, the place where we go
Seeking, not in hope to
Arrive or find. He keeps the interstices
In our knowledge, the darkness
Between stars. His are the echoes
We follow, the footprints he has just
Left. We put our hands in
His side hoping to find
It warm. We look at people
And places as though he had looked
At them, too; but miss the reflection.

Negative theology (via negative=negative way) is not, as one might instinctively think, theology that attempts to disprove the existence of God. It is theology that attempts to describe God by what he is not, since he is mysterious and beyond comprehension.