Just because you can't explain it doesn't mean it's a miracle.' Religion is a controversial business in the Discworld. Everyone has their own opinion and indeed their own gods. Who come in all shapes and sizes. In such a competitive environment there is a pressing need to make one's presence felt. And it's certainly not remotely helpful to be reduced to be appearing in the form of a tortoise a manifestation far below god-like status in anyone's book. In such instances you need an acolyte and fast. Preferably one who won't ask too many questions...