"Mere opinions, in fact, were as likely to govern people's actions as hard evidence, and were subject to sudden reversals as hard evidence could never be. So the Galapagos Islands could be hell in one moment and heaven in the next, and Julius Caesar could be a statesman in one moment and a butcher in the next, and Ecuadorian paper money could be traded for food, shelter, and clothing in one moment and line the bottom of a birdcage in the next, and the universe could be created by God Almighty in one moment and by a big explosion in the next--and on and on."
...and if that quote doesn't intrigue you...maybe this will?
"(Now, there is a big-brain idea I haven’t heard much about lately: human slavery. How could you ever hold somebody in bondage with nothing but your flippers and your mouth?)"