“It takes an extrovert to bring out my upbeat side. If it were up to me, everyone would probably just sit around talking about mysteries of the universe.”

“I looked around. As flock leader, everyone was expecting me to make a decision. Jeb's presence here would bring uncertainty, chaos, probably danger.It would perk up my day.”

“I think if you were Satan and you were settin around tryin to think up somethin that would just bring the human race to its knees what you would probably come up with is narcotics.”

“While the introvert is reflecting on the question (thinking first), the extrovert takes this as an invitation to fill the void (talking first). As long as the introvert doesn’t interrupt, the extrovert continues to fill the interpersonal space with talk. But as long as the extrovert talks, the introvert can’t think and stays mute. Mute means the invitation is still open, and continued talk assures that the introvert remains mute. By the time the extrovert pauses to ask, the introvert’s head is pounding and he or she just wants to get out so she can think. The extrovert just assumes the introvert had nothing to say, and moves on.”

“You train yourself in the art of being mysterious to everyone. My dear friend! What if there were no one, who cared about guessing your riddle, what pleasure would you then take in it?”

“In fact, if there were such a thing as an international thieving contest, Ankh-Morpork would bring home the trophy and probably everyone's wallets.”