CHALLENGE: 'Have you seen The Preacher?' RESPONSE: 'I have seen a sandworm.' CHALLENGE: 'What about that sandworm?' RESPONSE: 'It gives us the air we breathe.' CHALLENGE: 'Then why do we destroy it's land?' RESPONSE: 'Because Shai-Hulud [Sandworm deified] orders it.'
Riddles of Arrakis was a book written by Farad'n Corrino, "Harq al-Ada", sometime after 10219 AG.