How can ‘God’ be an angel? In Pullman’s underlying ‘creation myth’, matter became conscious of itself and generated Dust. Some of it ‘condensed’ into the first angel – a being of pure Dust. This new being was fully conscious, and when he began to see other angels condensing out of the Dust he realised what an opportunity he had. Since he came first, he could tell the subsequent angels that he was God and had created them.
The angels loved and obeyed him, but the Sophia (Wisdom), the youngest and most beautiful angel, discovered the truth about the Authority who subsequently expelled her. There was an angelic rebellion, but the Authority defeated it and imprisoned the rebels in one of the many worlds.
Then Sophia told them about the Authority’s lies to human beings (and conscious beings in other worlds), and the rebels escaped to bring enlightenment, wisdom and full consciousness to the poor creatures under the Authority’s rule.