“The trouble with thinking was that, once you started, you went on doing it.”

“You don't make waves unless there's a reason, and it better be good. Because once you do, that's it. You're a trouble make, and they never think of you any other way.”

“Once you start doing only what you've already proven you can do, you're on the road to death.”

“Living is like tearing through a museum. Not until later do you really start absorbing what you saw, thinking about it, looking it up in a book, and remembering - because you can't take it in all at once.”

“Once you start thinking about the lies people tell when they don't know they're telling them, the truths people reveal when they think they're lying, then you can start to build a world.”

“I don't hold with paddlin' with the occult," said Granny firmly. "Once you start paddlin' with the occult you start believing in spirits, and when you start believing in spirits you start believing in demons, and then before you know where you are you're believing in gods. And then you're in trouble.""But all them things exist," said Nanny Ogg."That's no call to go around believing in them. It only encourages 'em.”