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.

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

You can get along very well in this world by simply coming up with a quantity of reasonably valid statements.

I think my novel, 'Walden Two,' has made people stop and look at the culture they have inherited and wonder if it is the last word or whether it can be changed.

No theory changes what it is a theory about; man remains what he has always been.

A person who has been punished is not less inclined to behave in a given way; at best, he learns how to avoid punishment.