What is something that they could say that would be sacrilegious?

"O brave new world, O brave new world …" In his mind the singing words seemed to change their tone. They had mocked him through his misery and remorse, mocked him with how hideous a note of cynical derision! Fiendishly laughing, they had insisted on the low squalor, the nauseous ugliness of the nightmare. Now, suddenly, they trumpeted a call to arms. "O brave new world!" Miranda was proclaiming the possibility of loveliness, the possibility of transforming even the nightmare into something fine and noble. "O brave new world!" It was a challenge, a command.