Norton Juster, The Phantom Tollbooth

"So many things are possible just as long as you don't know they're impossible."

"... what you learn today, for no reason at all, will help you discover all the wonderful secrets of tomorrow."

"Expect everything, I always say, and the unexpected never happens."

"You may not see it now,"said the Princess of Pure Reason, looking knowingly at Milo's puzzled face, "but whatever we learn has a purpose and whatever we do affects everything and everyone else, if even in the tiniest way."

"The most important reason for going from one place to another is to see what's in between, and they took great pleasure in doing just that."

"... what you learn today, for no reason at all, will help you discover all the wonderful secrets of tomorrow."

"if something is there, you can only see it with your eyes open, but if it isn't there, you can see it just as well with your eyes closed. That's why imaginary things are often easier to see than real ones."