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. - B. F. Skinner

Ethical control may survive in small groups, but the control of the population as a whole must be delegated to specialists—to police, priests, owners, teachers, therapists, and so on, with their specialized reinforcers and their codified contingencies.

Once in a while a new government initiates a program to put power to better use, but its success or failure never really proves anything. In science, experiments are designed, checked, altered, repeated — but not in politics... We have no real cumulative knowledge. History tells us nothing. That's the tragedy of a political reformer.

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.