“The real question is not whether machines think but whether men do. The mystery which surrounds a thinking machine already surrounds a thinking man.”

“Why did colleges make their students take examinations, and why did they give grade? What did a grade really mean? When a student "studied" did he do anything more than read and think-- or was there something special which no one in Walden Two would know about? Why did the professors lecture to the students? Were the students never expected to do anything except answer questions? Was it true that students were made to read books they were not interested in?”

“Any single historical event is too complex to be adequately known by anyone. It transcends all the intellectual capacities of men. Our practice is to wait until a sufficient number of details have been forgotten. Of course things seem simpler then! Our memories work that way; we retain the facts which are easiest to think about.”

“The hero is a device which the historian has taken over from the layman. He uses it because he has no scientific vocabulary or technique for dealing with the real facts of history-- the opinions, emotions, attitudes; the wishes, plans, schemes; the habits of men. He can't talk about them so he talks about heroes.”

“A failure is not always a mistake, it may simply be the best one can do under the circumstances. The real mistake is to stop trying. ”

“Society already possesses the psychological techniques needed to obtain universal observance of a code -- a code which would guarantee the success of a community or state. The difficulty is that these techniques are in the hands of the wrong people--or, rather, there aren't any right people.”

“It is not a question of starting. The start has been made. It's a question of what's to be done from now on.”