Science is a willingness to accept facts even when they are opposed to wishes.

When we say that a man controls himself, we must specify who is controlling whom.

In the world at large we seldom vote for a principle or a given state of affairs. We vote for a man who pretends to believe in that principle or promises to achieve that state. We don't want a man, we want a condition of peace and plenty-- or, it may be, war and want-- but we must vote for a man.

Behavior is determined by its consequences.

A self is a repertoire of behavior appropriate to a given set of contingencies.

Chaos breeds geniuses. It offers a man something to be a genius about.

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.