What is it about Didactylos's book that the Turtle Society finds so inspiring?

Did Lu-Tze do anything to significantly change the story's outcome and if so, what?

Why does Vorbis carry Brutha out of the desert if he feared him?

Why does Om briefly wish to have Vorbis, rather than Brutha as his prophet?

In what way is Brutha's illiteracy similar to Didactylos's blindness?

Why does the church lie about the operation of the Doors of the Great Temple?

If Brutha had abandoned Vorbis in the desert, how might the story be different?

In the afterlife, Vorbis is too afraid to cross the desert. Why? What does he fear?