“If you're born in a cubicle and grow up in a corridor, and work in a cell, and vacation in a crowded sun-room, then coming up into the open with nothing but sky over you might just give you a nervous breakdown.”

“You must keep sending work out; you must never let a manuscript do nothing but eat its head off in a drawer. You send that work out again and again, while you're working on another one. If you have talent, you will receive some measure of success - but only if you persist.”

“We would grow tired of it, Grandpa, if it were beautiful all the time. A little change from night to night is good for us.''For you, because you're young, Wanda. You have many, many evenings ahead of you. I don't. I want more good ones.”

“All knowledge is one. When a light brightens and illuminates a corner of a room, it adds to the general illumination of the entire room. Over and over again, scientific discoveries have provided answers to problems that had no apparent connection with the phenomena that gave rise to the discovery.”

“You show me someone who can't understand people and I'll show you someone who has built up a false image of himself.”

“Creationists make it sound as though a 'theory' is something you dreamt up after being drunk all night.”

“Give us but the chance and a new generation of Earthmen would grow to maturity, lacking insularity and believing wholeheartedly in the oneness of Man.”