" Druids are not allowed to write anything down, it’s against the rules. You know that! Once you write something down it becomes fixed. It becomes dogma. People can argue about it, they become authoritative, they refer to the texts, they produce new manuscripts, they argue more and soon they’re putting each other to death. If you never write anything down then no one knows exactly what you said so you can always change it. "

― Bernard Cornwell , Warlord Chronicles