Behavior is determined by its consequences.

The human species took a crucial step forward when its vocal musculature came under operant control in the production of speech sounds. Indeed, it is possible that all the distinctive achievements of the species can be traced to that one genetic change.

It is a surprising fact that those who object most violently to the manipulation of behaviour nevertheless make the most vigorous effort to manipulate minds.

At this very moment enormous numbers of intelligent men and women of goodwill are trying to build a better world. But problems are born faster than they can be solved.

That's all teaching is; arranging contingencies which bring changes in behavior.

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.