"No mortal man, moreover is wise at all moments."

"In these matters the only certainty is that nothing is certain."

"In comparing various authors with one another, I have discovered that some of the gravest and latest writers have transcribed, word for word, from former works, without making acknowledgment."

"Why is it that we entertain the belief that for every purpose odd numbers are the most effectual?"

"The best plan is to profit by the folly of others."

"From the end spring new beginnings."

"These days, the wages of sin depend on what kind of deal you make with the devil."

"Stubbornness is also determination. It's simply a matter of shifting from 'won't power' to 'will power.'"

"American foreign policy must be more than the management of crisis. It must have a great and guiding goal: to turn this time of American influence into generations of democratic peace."

"Tourist, Rincewind decided, meant 'idiot'."

"We love characters in proportion as they are impulsive and spontaneous."

"Television is a medium because anything well done is rare."