Why is there something rather than nothing?

In the "Atheist Tapes", the theologian Denys Turner asks the troubling question "Why is there something rather than nothing"? Then the interviewer Miller rightfully answered with another question: "Why is there God instead of nothing"? Turner then claimed "God is not a kind of thing". I suppose what he meant by that is that God is somewhat indistinguishable from nothingness, he's a sort of abstract entity.

So the only reason - according to Turner - there can be something instead of nothing is if a not-a-thing entity, existing inside the state "nothing", suddently decides to create a universe.

Theology is really fun. We learn a lot about entities that are not "things".