They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

“Fate can be one mean god at times.”

“The universe is, instant by instant, recreated anew. There is in truth no past,…”

“Luck is my middle name," said Rincewind, indistinctly. "Mind you, my first name…”

“Granny Weatherwax was often angry. She considered it one of her strong points. …”